LAHORE A large number of workers belonging to various trade unions held a mass protest demonstration at Nila Gumband under the aegis of Pakistan Workers Federation against sky rocketing price hike of essential commodities and rising unemployment, says a press release. They also condemned the terrorists attack on naval base. mehran. And urged the government to take strict action against corrupt mafia. The demonstration was addressed by Khurshid Ahmad, General Secretary, Nasim Iqbal, Osama Tariq, Salah-ud-Din and Khushi Muhammad Khokhar.