An armed gang barged onto the train and began hacking and shooting anyone in sight.

一伙武装匪徒冲上火车，开始见人就刀砍枪击。

《柯林斯英汉双解大词典》

This would create an economic disincentive to kill—shooting a rival would badly disrupt gang business.

这就产生了对杀人的抑制因素[font=Verdana]-[font=宋体]击杀竞争对手会严重的扰乱帮派生意。

youdao

A gang of bastards are wildly shooting on the next street. We must leave this place the soonest.

一帮混蛋在街邻开枪了。我们得赶快离开这里。

youdao

Mr Hanson was injured when caught up in a gang shooting and as a result started a basketball club as an alternative to guns, gangs or offending.

BBC: Basketball coach honoured for fighting gang crime

London (CNN) -- Three men convicted in a London gang shooting that left a little girl paralyzed were sentenced to life in prison Thursday, the Metropolitan Police said.

CNN: UK: Life in prison for 3 men who paralyzed girl in shooting

Landron and Pacheco are known members of the Latin Kings gang and believe the motive for the shooting involved a gang dispute.

WSJ: Rhode Island Arrests Follow Teenager's Shooting Death in Bronx