Adam Cunnington scored twice as Tamworth inflicted a first home defeat of the season on Forest Green Rovers.
James Norwood had two chances for the hosts but Cunnington pounced on Tommy Wright's looping header for his 10th of the season to put Tamworth ahead.
The striker then scored from the spot after being fouled by Jamie Collins to become the league's leading goalscorer.
Collins netted a header following Magno Vieira's pass from Yan Klukowski's free kick, but Tamworth hung on for the win.
The home side twice went close to levelling a minute after closing the gap as Matt Taylor's shot was saved and Collins fired the rebound over the bar.
Substitute Vieira also had a chance with time running out but Tamworth held firm for their fifth away win of the season.
Second-placed Rovers went into the game two points behind Newport, but now find themselves five points adrift as the leaders beat Ebbsfleet.
Tamworth, who inflicted a second straight defeat on Forest Green, remain seventh but close the gap on the play-off places to three points.
VIEWS FROM THE DRESSING ROOM
Forest Green Rovers manager Dave Hockaday told BBC Gloucestershire:
"We had two great chances to go ahead and we didn't take them. We were sloppy in the first half.
"I thought the lads were brilliant in the second half and we took the game to them.
"I've got to look at the positives and we deserved at least a draw.
"We're in a turbulent spell at the moment after two defeats but we've got to bounce back."
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Live Text Commentary
Full Time The final whistle is blown by the referee.90:00 +4:06
James Norwood takes a shot. Blocked by Peter Till.90:00 +3:39
Corner taken by Chris Stokes from the left by-line.90:00 +3:06
Matt Taylor takes a shot. Save made by Tony Breedon. Magno Vieira takes a shot. Blocked by Tom Marshall.90:00 +1:43
Free kick awarded for an unfair challenge on Paul Green by Adam Cunnington. Direct free kick taken by Sam Russell.88:16
Yan Klukowski has a direct shot on goal from the free kick, save by Tony Breedon. Chris Stokes takes a inswinging corner from the left by-line to the near post.88:16 Booking
Booking Booking for George Baldock.88:12
Free kick awarded for an unfair challenge on Matt Taylor by Lloyd Kerry.86:31
Outswinging corner taken by Yan Klukowski from the right by-line.83:53
Chris Stokes takes the direct free kick. Free kick awarded for a foul by Jamie Turley on Tom Marshall. Tony Breedon takes the direct free kick.83:53 Substitution
Substitution Sam Oji comes on in place of Lee Hendrie.83:53
Free kick awarded for an unfair challenge on Matt Taylor by Tom Marshall.83:37
Adam Cunnington has an effort at goal from outside the penalty box missing to the wide right of the goal.82:20
Paul Green fouled by Adam Cunnington, the ref awards a free kick. Chris Stokes restarts play with the free kick.81:42
Tony Breedon takes the free kick.81:42 Booking
Booking Booking for Ed Asafu-Adjaye for unsporting behaviour.81:25 Booking
Booking Booking for Matt Taylor.81:11
Matt Taylor gives away a free kick for an unfair challenge on George Baldock.78:12 Substitution
Substitution Omar Koroma joins the action as a substitute, replacing Kieron Forbes.74:14
Magno Vieira takes a shot. Tony Breedon makes a save. Yan Klukowski takes a shot. Save by Tony Breedon.
Inswinging corner taken from the left by-line by Yan Klukowski.70:15 Substitution
Substitution Marcus Kelly goes off and Peter Till comes on.68:34
Yan Klukowski shoots direct from the free kick.68:34 Booking
Booking Marcus Kelly goes into the referee's book for unsporting behaviour.68:16
Matt Taylor fouled by Marcus Kelly, the ref awards a free kick.66:44
Chris Stokes concedes a free kick for a foul on Adam Cunnington. Marcus Kelly sends in a cross, Tom Marshall has a headed effort at goal from close range which goes wide of the left-hand post.63:43
Free kick awarded for an unfair challenge on Adam Cunnington by Jamie Turley. Lee Hendrie takes the direct free kick.61:37
Matt Taylor takes a shot. Save by Tony Breedon. Shot by Jamie Collins from outside the box goes over the net.60:29
Assist on the goal came from Magno Vieira.60:29 Goal scored
Goal! - Jamie Collins - Forest Grn 1 - 2 Tamworth Jamie Collins finds the net with a headed goal from close in. Forest Green 1-2 Tamworth.59:27
Free kick awarded for an unfair challenge on Ed Asafu-Adjaye by George Baldock. Direct free kick taken by Yan Klukowski.56:55
Adam Cunnington takes a shot. Blocked by Paul Green.54:39
Effort on goal by Jamie Collins from just inside the penalty area goes over the target.54:12
Foul by Tommy Wright on Jamie Turley, free kick awarded. Free kick taken by Sam Russell.52:43
Greg Taylor takes a shot. Save made by Sam Russell.51:31
The referee blows for offside. Direct free kick taken by Sam Russell.49:28
Foul by Paul Green on George Baldock, free kick awarded. Tom Marshall takes the direct free kick.45:28
Magno Vieira challenges Greg Taylor unfairly and gives away a free kick. Direct free kick taken by Tony Breedon.45:01
The match restarts for the second half.45:01 Substitution
Substitution Magno Vieira replaces Ben Wright.45:01 Substitution
Substitution Steve Brogan goes off and Yan Klukowski comes on.45:00 +2:52 Half time
Half Time It is the end of the first-half.43:42
Tony Breedon takes the free kick.43:42 Booking
Booking Steve Brogan goes into the referee's book for unsporting behaviour.43:25
Unfair challenge on Lee Hendrie by Steve Brogan results in a free kick.40:43
Shot on goal by Lloyd Kerry from just inside the area clears the crossbar.39:43
Duane Courtney challenges Matt Taylor unfairly and gives away a free kick. Ben Wright takes the free kick.35:34
Lee Hendrie takes a outswinging corner to the near post.35:06
Steve Brogan takes a shot. Tony Breedon makes a save.32:32
Sam Russell takes the free kick.32:32 Booking
Booking Booking for Tommy Wright.32:00
Unfair challenge on Jamie Collins by Tommy Wright results in a free kick.30:09
Lloyd Kerry challenges Matt Taylor unfairly and gives away a free kick. Ben Wright takes the direct free kick.28:10
Steve Brogan takes a shot. Tony Breedon makes a save.27:38 Booking
Booking Tom Marshall receives a caution for dissent.24:58 Goal scored
Goal! - Adam Cunnington - Forest Grn 0 - 2 Tamworth Penalty taken right-footed by Adam Cunnington and scored. Forest Green 0-2 Tamworth.24:03 Booking
Booking Jamie Collins is shown a yellow card.23:48
Jamie Collins concedes a Penalty for a foul on Adam Cunnington.21:26
Assist on the goal came from Tony Breedon.21:26 Goal scored
Goal! - Adam Cunnington - Forest Grn 0 - 1 Tamworth Adam Cunnington scores a headed goal from deep inside the penalty box. Forest Green 0-1 Tamworth.20:22
Marcus Kelly fouled by Kieron Forbes, the ref awards a free kick. Free kick taken by Tony Breedon.16:46
Foul by Jamie Collins on Greg Taylor, free kick awarded. Tony Breedon takes the direct free kick.16:06
Unfair challenge on Ben Wright by Tom Marshall results in a free kick. Direct free kick taken by Chris Stokes.14:57
Adam Cunnington takes a shot. Blocked by Paul Green.14:00
Headed effort from inside the area by Tommy Wright misses to the left of the target.12:23
Corner taken right-footed by Lee Hendrie to the near post, Sam Russell makes a save.11:29
Tony Breedon takes the free kick.11:29 Booking
Booking Jamie Turley is shown a yellow card for unsporting behaviour.10:31
James Norwood takes a shot. Save by Tony Breedon. Corner taken by Ben Wright from the left by-line. Handball by Jamie Turley.9:49
Unfair challenge on George Baldock by Steve Brogan results in a free kick. Tom Marshall takes the free kick.9:20
Unfair challenge on Duane Courtney by Matt Taylor results in a free kick. Tony Breedon takes the direct free kick.8:11
Header by James Norwood from deep inside the penalty area misses to the left of the goal.5:42
Ben Wright has an effort at goal from the edge of the area that misses to the right of the target.5:03
Corner taken short by Ben Wright.4:45
Chris Stokes takes a shot. Tony Breedon makes a save.3:24
Unfair challenge on Ed Asafu-Adjaye by Adam Cunnington results in a free kick. Sam Russell restarts play with the free kick.0:45
Marcus Kelly takes a shot. Jamie Turley gets a block in.0:00
The game kicks-off.
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