At least 30 attackers were killed in the operation, which was led by Pakistan Army’s elite commandos and involved the Pakistan Air Force’s drone technology.

Insurgents who attacked a passenger train in Pakistan killed 21 hostages, the military said Wednesday, while security forces rescued over 300 others and killed all 50 of the assailants.

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.