A massive blast that targeted a convoy of Chinese workers in Pakistan's largest city killed two nationals, Beijing's embassy said Monday, in an attack claimed by a separatist group.

Three people, including two Chinese nationals, have died in a powerful explosion near Karachi international airport, prompting outrage from Beijing. The Baloch Liberation Army has claimed responsibility for the attack.

Two Chinese nationals were killed and one was injured in a suicide attack near Karachi’s international airport Sunday evening, China’s embassy in Pakistan said Monday, marking the latest in a string of violence against China’s personnel and investments in the country in recent years.