At least four killed after militants storm Karachi police headquarters

Police officers take position after Friday's attack by gunmen in Karachi.

Islamabad, Pakistan (CNN)At least four people were killed and 14 were injured after militants stormed the police headquarters in the southern Pakistani city of Karachi, according to officials.

Militants attacked the police station with hand grenades and shots were fired, an eyewitness told CNN. Pakistan's Taliban, known as Tehreek e Taliban Pakistan (TTP), claimed responsibility for the attack, according to spokesman Mohammad Khorasani.
Two policemen, two rangers and one civilian were killed in the attack, according to Murtaza Wahab Siddiqui, a senior leader of the Pakistan People's Party, the ruling party in Sindh province where Karachi is located.
    Of the 14 injured, one is in critical condition, he added.
      The siege was brought to an end on Friday, and Sindh Chief Minister Murad Ali Shah later said the three militants responsible for the attack were killed.
      "Three attackers were behind the attack on the Karachi Police office. All three are now dead. The police force, rangers and army helped in resolving this situation. I commend them for their bravery," he said in a video statement.
      Video recorded by emergency workers attending the scene of the attack on the police station on Friday.