(Updates with government order to troops to shoot rioters) By Faisal Aziz KARACHI, May 13 (Reuters) - The Pakistani government authorised paramilitary troops on Sunday to shoot anyone involved in serious violence in Karachi, where 37 people have been killed over the past two days, an official said. On Saturday, 34 people were killed and more than 130 wounded in the country's worst political street violence in two decades, sparked when Pakistan's suspended top judge tried to meet supporters in the southern city. Violence between pro-government and opposition activists eased on Sunday but three people were killed in separate incidents and protesters set fire to several shops and cars. Government attempts to remove Chief Justice Iftikhar Chaudhry over unspecified accusations of misconduct on March 9 have outraged the judiciary and the opposition. The judicial crisis has snowballed into a campaign against President Pervez Musharraf and is the most serious challenge to the authority of the president, who is also army chief, since he seized power in 1999. But the violence in Pakistan's biggest city sparked by the judge's visit has raised the spectre of bloody ethnic feuding that plagued Karachi in the 1980s and 1990s. "We have increased the presence of Rangers in the city and have told them to arrest or shoot anyone involved in violence and riots threatening life or property," Interior Secretary Syed Kamal Shah told Reuters, referring to a paramilitary force. "The events of yesterday were very serious and violent. The whole city was paralysed and many precious lives lost," he said. "We don't want a repeat." Two political activists, one from an opposition party and one from the pro-government Muttahida Qaumi Movement (MQM), which runs Karachi, were killed on Sunday. The body of a third man, shot in the head, was found in a volatile neighbourhood. Chaudhry, who denies wrongdoing and has refused to resign, flew into Karachi on Saturday, hoping to meet his supporters. But the violence prevented him from leaving the airport. NO EMERGENCY Musharraf condemned the clashes and criticised Chaudhry for ignoring a government appeal not to go to the volatile city. In a speech to tens of thousands of supporters in Islamabad on Saturday, Musharraf ruled out a state of emergency. He said elections due this year -- first a presidential election followed by a general election -- would be on time. Mourners at the funeral of two members of an opposition religious alliance shouted anti-Musharraf slogans and called for an Islamic revolution as the bodies, draped in party flags, were carried away for burial. The police have been widely criticised for failing to stop the clashes between members of the MQM, which opposed Chaudhry's visit, and its old enemies including the religious alliance and former prime minister Benazir Bhutto's Pakistan People's Party (PPP). Most of those killed were members of the PPP and the opposition Awami National Party (ANP), which represents ethnic Pashtuns. Provincial ANP President Afrasiab Khattak said he feared ethnic violence: "If they fail to control militancy it will divide Karachi on ethnic lines." But a PPP leader played down the fear. "I don't think it's ethnic violence, it's government supporters trying to beat the opposition into submission," said Raza Rabbani, leader of the opposition in the upper house. Lawyers are due to boycott courts on Monday and the Islamist alliance has called for a nationwide protest. (Additional reporting by Faisal Aziz and Imtiaz Shah)
