Khan, currently in London, told a gathering recently that the British government should stop its citizens from inciting violence. His remarks were perceived as a reference to MQM chief Altaf Hussain, who lives in self-exile in London and is a British citizen.
He also held the MQM chief responsible for the killing of Tehrik-e-Insaf leader Zahra Shahid Hussain, who was shot outside her home in Karachi on May 18.
The MQM's coordination committee responded to Khan's comments today by saying that he was using the killing of Zahra Hussain for political gains.
Khan was "acting as both lawyer and judge" in accusing the MQM of involvement in Zahra's death, he said. "This just shows Imran Khan's political immaturity," he added.
While speaking in Britain, Khan accused the MQM chief openly threatening Pakistan Tehrik-e-Insaf workers and leaders through his public broadcasts.
He reiterated his earlier stance that the British government is responsible for controlling the actions of its citizens. He said he had asked Britain to act against Hussain after he allegedly threatened to kill Tehrik-e-Insaf workers.