Detroit police say they're looking for a group of young men believed responsible for at least 15 armed robberies at gas stations and one attempted robbery.

Police say the string of robberies started Oct. 10 and the latest were Wednesday morning.

During the robberies, police say the men typically walk into the gas stations armed with an assault weapon and announce a holdup. They take cash and flee. In the attempted robbery, police say the men crashed a vehicle into the front of a gas station Oct. 10 but fled before getting inside.

No injuries have been reported in the robberies so far. Police say they plan to release a still photo of the suspects. They're seeking tips from the public.

String of robberies

It’s alleged that the three suspects attempted to rob one location on 10/10/12 (located in the 6500 block of VanDyke at 4:55 a.m.) by crashing a vehicle into the front of the building.  Failing to gain entry, they fled from the location.  The armed three suspects continued their crime spree by walking into another location on 10/10/12 (located in the 800 block of W. McNichols at 6:45 a.m.); three locations on 10/11/12 (located in the 10000 block of Gratiot at 12:45 a.m., in the 9700 block of Van Dyke at 12:57 a.m., and in the 1900 block of E. McNichols at 1:05 a.m. ); one location on 10/17/12 (located in the 1600 block of E. McNichols at 6:30  a.m.); three locations on 10/19/12 (located in the 9300 block of VanDyke at 5:10 a.m., in the 1100 block of Clay at 5:30 a.m., and in the 3700 block of Joy at 6:00 a.m.).  The last two incidents occurred on 10/23/12, when four to five armed male suspects entered the businesses located in the 800 block of W. McNichols at 5:15 a.m., and in the 12800 block of W. McNichols at 5:40 a.m.