Karachi, March 31 (ANI): Dozens of supporters of former president of Pakistan, Pervez Musharraf staged protest in Karachi demanding his release to visit his sick mother in Sharjah hospital a day ahead of his appearance in a court in treason case. 95-year-old Zarin Musharraf, mother of the former military ruler, was admitted to the WW Wilson Hospital in Sharjah on Saturday. Musharraf has been summoned to a Special Court set up to try him in a treason case for imposing emergency in the country in 2007. Holding placards, the protesters chanted slogans supporting the former ruler. They held flags of Musharraf's All Pakistan Muslim League party who had organised the demonstration.