Gunmen have killed one of Pakistan's most famous singers in the southern port city of Karachi.

Amjad Sabri was shot several times on Wednesday while driving in his car. Sabri's brother, who was also in the car, was injured in the shooting.

Sabri and his late father, Ghulam Farid Sabri, were well-known qawwali singers, a style of music rooted in Sufism, or Islamic mysticism. Islamic extremists reject Sufi traditions and have targeted Sufis in past attacks.

Karachi has long been gripped by violence, with attacks carried out by Islamic militants as well as ethnic separatists, criminal gangs and rival political parties.

On Tuesday, gunmen killed a member of the Ahmadi religious minority, and the son of a provincial judge was abducted. No group has claimed the attacks.