Karachi: Two Chinese nationals were injured on Tuesday when a local security guard opened fire at them following a quarrel in Pakistan 's port city of Karachi, police said.Chinese Nationals ShotThe incident reportedly took place at a police station in the Industrial Trading Estate area of Karachi in Sindh province.

Authorities say a Pakistani guard shot and wounded two Chinese nationals working in a textile mill in the southern port city of Karachi, but the attack was not related to militant violence.

Authorities in Pakistan said Tuesday that a local security guard at a factory in the southern port city of Karachi shot and injured two Chinese nationals, the third attack this year in the country targeting workers from China.