Gunman tries a carjacking. Problem is, it's an unmarked police car — with two officers inside. Oops.

It's amazing the trouble one can encounter when making assumptions — particularly if one is carjacking in the process.

Who wins the Darwin Award this time?

• St. Louis police told KMOV-TV a pair officers were in an unmarked car Tuesday morning when they spotted a vehicle they believed was taken in a recent carjacking.
• But while the officers waited on data about the vehicle, the station said a man armed with an AK-47 rifle exited the suspicious car and demanded the officers get out of theirs.

Image source: KMOV-TV video screenshot

• As you might imagine, police told KMOV they don't believe the gunman knew who he was messing with — although authorities added that the officers were wearing clothing that clearly indicated they were law enforcement.

What went down next?

• Just like that, gunfire was exchanged, the station said.
• The gunman was wounded, and one of the officers suffered facial injuries from broken glass, police told KMOV.

Image source: KMOV-TV video screenshot

• The gunman, 21, was taken to a hospital with non-life threatening injuries, the station said, and the injured officer was treated and is expected to recover.
• The suspicious vehicle took off from the scene with at least one person inside, KMOV reported.
• While that car was later recovered, the station said cops are looking for another suspect.
• Police believe the vehicle in question was taken in a mid-October carjacking, KMOV added.

(H/T: Blue Lives Matter)