The four were in a van near the University of Karachi's Confucius Institute when the blast ripped through the vehicle on Tuesday evening, Pakistan's Interior Minister Rana Sana Ullah told CNN. A female suicide bomber was responsible for the attack, the Karachi police said in a statement. CCTV footage shared by the police showed a woman clad in a Burka detonated herself outside the Confucius Institute.
The Baloch Liberation Army (BLA), a militant separatist group from Pakistan's southwestern province of Balochistan, claimed responsibility for the attack, which it said was carried out by a woman suicide bomber. In a statement shared with CNN, the BLA said the Confucius Institute was targeted because it is a "symbol of Chinese economic, cultural and political expansionism." A fourth Chinese teacher was injured in the blast, China's Foreign Ministry said.