The Islamic State terror group has claimed responsibility for the killing of two Chinese nationals, including a woman, who were abducted by armed gunmen from Pakistan's restive northwest Balochistan province recently.

The Chinese pair was studying Urdu language at a local teaching center in the provincial capital of Quetta when it was forcibly kidnapped by unknown gunmen last month.

Another Chinese woman had escaped the abduction. Islamic State on its 'Amaq News Agency' uploaded a statement in Arabic yesterday, saying it had killed the two abducted Chinese nationals.

The Pakistani officials are yet to comment on the ISIS' confirmation, which came a day after army claimed that it had carried out an operation against ISIS in Balochistan. At least 12 ISIS militants were killed in a three-day operation at the start of June in the mountains of Mastung district of Balochistan.