A Pakistani supporter of Muttahida Qaumi Movement (MQM) party shouts slogans during a protest against Imran Khan, the head of Pakistan Tehreek-e-Insaf (PTI) party, in Karachi on May 20, 2013. Thousands of supporters of MQM, a powerful party in southern Pakistan, rallied to protest accusation by Imran Khan's party against MQM's party chief. The party of former Pakistani cricket hero Imran Khan secured victory in a repeat election held in one constituency of violence-plagued Karachi, election officials said Monday.