NEW : MQM and the office of Pakistan 's Prime Minister condemn violence in Karachi . Altaf Hussain , 60 , leads Karachi 's MQM from the Karachi . He was arrested at his Sindh province home Tuesday in connection with a money laundering probe . MQM is based in Karachi and is a force in Sindh province 's politics . MQM , a force in Sindh province , has fourth -largest contingent in the provincial assembly .
NEW : MQM and the office of Pakistan 's Prime Minister condemn violence in Karachi . Altaf Hussain , 60 , leads Karachi 's MQM from the Karachi . He was arrested at his Sindh province home Tuesday in connection with a money laundering probe . MQM , a force in Sindh province , has fourth -largest contingent in the provincial assembly .