The law enforcement agency described Crooks's search history, and it released photos of the gun he used and the improvised explosive devices found in his car.

For years they were mainly targeted with land mines, improvised explosive devices, rocket-propelled grenades and anti-tank guided missiles, like “shoot and scoot” shoulder-fired systems.

The man then ignited an improvised explosive device, threw it at the main entrance then ran away.

Last Saturday, an improvised explosive device killed one person and wounded 14, including three soldiers.

By 2016, the gang was conducting militarized training operations for its members that included the use of improvised explosive devices, according to authorities.