Robbers with knives strike at Birmingham jewellers
A smoke device was hurled into a jewellers before robbers rushed in armed with a sledgehammer and knives.
The men struck at Pahal Jewellers on Soho Road, Birmingham, where they threatened staff before making off in a Mercedes car with, police said, "a significant quantity of jewellery".
Detectives said the robbery at about 16:45 BST on Friday was "frightening" for staff.
They have described the raid as "well-organised".
Witnesses have been identified, according to the West Midlands force which says it is reviewing CCTV footage.
Det Insp Dave Sanders said: "This appears to have been a well-organised robbery; all of the men were masked, one held open the shutters while others threatened staff and stole valuables.
"No-one was injured but clearly this would have been a very frightening experience for the staff; we need to find the people responsible quickly."