Asif Shahzad adds from Lahore: Mr Raza was buried in Lahore's Allama Iqbal Town. Talking to Dawn, Intizar Mehdi, a cousin of the deceased, alleged that it was a target killing. “The moment Hammad opened the door, the intruders shot him in the head without having any argument,” he said, adding that the robbers would not act the way the killers had. There was a lot of jewellery and cash in the house but the gunmen had not touched anything, he said. The deceased is survived by the wife and three children. Chaudhry has been at the centre of a judicial crisis since Musharraf decided to sack him months ago over undisclosed allegations of misconduct. Analysts speculated Musharraf's motive is aimed at removing a possible obstacle should his plans for re-election run into constitutional challenges. Hammad was briefly detained on 9 March, the day Chaudhry was suspended, Malik said. Supreme Court's additional registrar Syed Hamad Amjad Raza was shot dead by four men who broke into his house before dawn on Monday. Talking to Dawn, a police officer claimed that the murder had been committed by robbers, but Mr Hammad Raza's widow Shabana, a witness to the killing, said it was a target killing. She alleged that the government and agencies were involved in the murder. She said that she saw several policemen lurking around in the lawn of her house when she ran out crying for help, but they did nothing to catch the culprits. She vowed to do everything possible to bring those responsible to justice. Her brother, Abid Hussain Shah, also insisted that it was not a case of robbery, because nothing had been found missing from the house, except two cellphones. “It’s a target killing and a message to judges,” he said. Soon after the murder, judges of the Supreme Court, including Chief Justice Iftikhar Mohammad Chaudhry, visited Mr Raza's house and, taking suo motu action, ordered the Inspector General of Police and the Senior Superintendent of Police of Islamabad to appear before the court on Tuesday. Additional questions about the killing were raised again when it was disclosed that three policemen were deployed at Raza's house on security detail. Ms Raza said that when she ran downstairs screaming for help, there were policemen on the front lawn who did nothing. According to reports, Raza had told family and friends he had been summoned by unidentified investigative agencies "trying to get information about the alleged 'wrongdoing' of the chief justice.