Pakistan's southwest city of Quetta Gunmen killed four policemen. The attack happened on Tuesday night, citing local police spokesman, Prince Farhad international

newspapers reported on Wednesday. Farhad said the Prince, the attack has no immediate claim of responsibility. However, the matter is being investigated. Under pressure from the government to keep the country in the region, often small-small separatist groups have been targeting police and security forces. The attack is believed to be part of that.