Nearly 350 hostages have been rescued at the end of a deadly standoff between Pakistan’s military and armed militants who hijacked a train in the southwestern Pakistani province of Balochistan, a security source told CNN Wednesday.

After more than a day of fighting with separatist militants who hijacked a train carrying hundreds of passengers, Pakistan’s army said it had brought the insurgent attack to an end, but that 21 passengers and four paramilitary personnel had been killed.

Pakistan’s military said Wednesday that a two-day battle with separatist militants over a hijacked passenger train had ended in bloodshed, claiming the lives of at least 25 soldiers and civilians held hostage and dozens of militants.