Videos showed flames engulfing cars and a thick column of smoke rising from the scene. There was a heavy military deployment at the site, which was cordoned off.

A massive blast outside Karachi Airport in Pakistan on Sunday killed two workers from China and injured at least eight, officials from both countries said.

Police and the provincial government said a tanker exploded outside the airport, which is Pakistan’s biggest.

A Chinese Embassy statement said that a convoy carrying Chinese staff of the Port Qasim Electric Power Company (Private) Limited had been attacked around 11 p.m., killing two Chinese and injuring one other. It said there were Pakistani casualties as well.