After the terrorist attack on the Indian Parliament in December 2001, the NDA government passed the Prevention of Terrorism Act. The aim of the act was to improve the government's ability to deal with terrorism. It initially failed to pass in the Rajya Sabha; therefore, the NDA took the extraordinary step of convening a joint session of the Parliament, where the numerical superior Lok Sabha allowed the bill to pass. The act was subsequently used to prosecute hundreds of people accused of terrorism. However, it was criticised by opposition parties and scholars for being an infringement upon civil liberties, and the National Human Rights Commission of India stated that it had been used to target Muslims. It was later repealed by the Congress-led UPA government in 2004.