Pakistani officials say at least 45 people have been killed in the southern port city of Karachi, after the assassination of a provincial lawmaker set off a number of revenge attacks.
Gunmen on motorcycles shot and killed lawmaker Raza Haider and his bodyguard Monday as they attended the funeral for one of Haider's relatives in the Nazimabad area of the city.
As news of the killing spread, gunfire erupted as protesters took to the streets of Karachi overnight, burning dozens of cars and shops. More than 90 people were wounded in the unrest.
Police and troops patrolled the streets Tuesday, working to restore calm in the city of more than 16 million people. At least 10 people were arrested in connection with the violence.
Haider was a member of the Muttahida Qaumi Movement, or MQM, which is part of the ruling political coalition in both Sindh province and the federal government.
The party represents the city's dominant Urdu-speaking population, who migrated from India after the creation of Pakistan in 1947.
MQM's main rival, the Awami National Party, is made up mostly of the ethnic Pashtun community in Karachi.
Police say they also detained at least three members of the banned Laskhar-e-Jhangvi militant group in Karachi Tuesday in connection with separate killings.
Some information for this report was provided by AFP, AP and Reuters