Clashes that killed at least 45 people overnight in Karachi scared residents off its streets on Tuesday as Pakistan's largest city was on alert for more violence after the shooting of a leader in a dominant political party. Officials said more than 100 people were wounded and dozens of vehicles and shops torched by mobs who took to the streets after Raza Haider, a member of the provincial Sindh Assembly from the Muttahida Quami Movement (MQM), was gunned down on Monday along with his bodyguard while attending a funeral. The government blamed the Taliban and the banned militant group Sipah-e-Sahaba...