Thieves used a stolen cement truck and a chain to yank the front doors off of Green Mountain Guns in Lakewood before looting the store of at least 14 hand guns, authorities say.

“They used a cable or chain to rip the doors off,” said Tim Marquez, Lakewood police spokesman. Suspects then bashed glass display cases at 4:20 a.m. and stole the hand guns, he said.

It was the second time that smash-and-grab thieves targeted the gun store at 3355 S. Yarrow St., Marquez said.

Last year, thieves used a stolen Jeep to ram the gun store entrance but were thwarted by a steel bar, he said.

The owners had installed concrete barriers in front of the store to protect it from thieves.

The cement truck’s engine was still running and the concrete mixing drum was still spinning when police arrived.

“We’re still on scene investigating and taking inventory of the losses,” Marquez said.

Police are reviewing surveillance video, looking for evidence including images of the suspects and a possible get-away car.

It takes special skills to drive a cement truck. It’s one clue detectives will follow in their search for suspects, Marquez said.