Two goals from Sam Baldock helped promotion-chasing West Ham to victory over managerless Leicester.
Baldock headed home to give the Hammers the lead before Julien Faubert's drive made it 2-0 barely a minute later.
Leicester, who had Jon Rudkin and Mike Stowell in charge following Sven-Goran Eriksson's departure this week, pulled one back through an Andy King header.
But Baldock ran clear to slot in a third for the home side before King smashed in a consolation.
A trip to the favourites for promotion was always going to be a tough test for City, with academy boss Rudkin and coach Stowell having little time to prepare the side following Eriksson's departure on Tuesday.
And there was no respite for the Foxes as West Ham secured their eighth win of the season to remain second in the Championship, while a second successive defeat left Leicester well short of the automatic promotion places with 19 points from 14 games.
The Hammers' own form had been patchy with only two wins in their previous five games but they dominated the opening stages and made the breakthrough after 20 minutes when Mark Noble surged forward unchallenged to the edge of the area before playing in John Carew, who chipped back across goal from the byeline for Baldock to head in at the far post.
Leicester had barely kicked the ball before they had conceded again, this time Faubert collected the ball 20 yards out and rifled home his first goal since February 2010.
It could have been worse for the visitors had the crossbar not denied Baldock with a curling effort from the edge of the box.
Leicester did finally wake up and home keeper Robert Green was forced into a point-blank save from Jermaine Beckford.
After the break, the Foxes grabbed a lifeline when when former Hammer Paul Konchesky crossed from the left and King nodded the ball back past Green.
Leicester thought they had a penalty when King tumbled in the box but their appeals were waved away by referee James Linington.
With 15 minutes to go Baldock appeared to have won the game for the home side when he finished coolly after running clear of the Leicester defence.
However, King fired into the top corner from 20 yards to set up a tense finish, during which they came agonisingly close to snatching a point when James Tomkins deflected Steve Howard's header on to the crossbar.