Karachi: Pakistani authorities have slapped a travel ban on an activist who campaigns for human rights in troubled Baluchistan province, stopping him going to a conference in the United States, sources said today.

Abdul Qadir Baloch, known as Mama (uncle) Qadir, was stopped at Karachi airport as he was about to fly to New York, where he was due to attend a weekend conference on alleged rights violations in Baluchistan and Sindh provinces.