Two Chinese nationals were killed in an explosion near the international airport of the southern Pakistani city of Karachi on Sunday night, the Chinese embassy in the country said, describing it as a "terrorist attack."

In a statement emailed to journalists, separatist militant group Baloch Liberation Army (BLA) claimed the explosion was an attack carried out by them using a vehicle-borne improvised explosive device targeting Chinese nationals, including engineers.

The Chinese embassy said a convoy from the Port Qasim Electric Power Co. was attacked near the airport.