Troops deployed after 34 killed in Pakistani city

A senior government official says Pakistani authorities have called in paramilitary forces to contain political and criminal violence in the southern city of Karachi after 34 people were killed here in less than two days.
Sharufuddin Memon says 11 people were gunned down on Tuesday, and 23 were killed the day before.
Memon is the security adviser to the chief minister of Sindh, the province where Karachi is the capital.
Karachi is Pakistan's largest city and has a long history of ethnic, sectarian and political violence. Much of the fighting is done by gangs allegedly affiliated with the main political parties in the city.
Memon says that more than 300 people were killed in Karachi in July.