Jackals

Jackals (ジャッカル) is a manga series by Hyung-Jin Kim and Shinya Murata. It was serialized in Young Gangan.

Plot
Cicero City, a city infested with immigrants where people of all races scramble to find work and shelter. Infested with destruction and slaughter, it's a chaotic society. Living on the outside of society, the Jackals are professional assassins with no allegiance, available to the highest bidder. This is their story.