The phrase "armed gang" refers to a group of people who are carrying weapons and working together to commit illegal activities or acts of violence. Full definition
Since then over 100 other citizens have been killed by armed gangs. (dailypost.ng)
Prosecutors believe as many as 20 armed gang members were present during the shoot - out. (dnainfo.com)
The society has become crime - infested; kidnapping has become the country's fastest growing and most profitable business; banditry has grown also and armed gangs hold sway in parts of many cities across the country. (punchng.com)