Although the presence of illegal aliens in Pakistan is against the law , the Government of Pakistan did not make a serious effort to deport them until January 2010 when Pakistani Interior Minister Rehman Malik asked illegal aliens to either leave or register themselves with the department concerned , as a major crackdown would soon be initiated against them . This action was taken following the recent bomb attack and targeted killings of political activists in the city , against foreign militants operating in Pakistan
bomb attack
2009 Karachi bombing
Immigration to Pakistan