Pakistani officials say insurgents who attacked a passenger train carrying 440 people in the southwest killed 21 hostages but security forces rescued the others.

Dozens of people rescued from a train hijacked by separatist militants in southwestern Pakistan arrived on Thursday in the city of Quetta, hours after security forces killed all 33 attackers to end a day-long standoff.

Separatist militants fired at a passenger train in southwestern Pakistan on Tuesday, injuring a train driver, police and railway officials said.