At least 11 people were killed and 24 wounded Monday in a gun and suicide bomb attack at a court complex in the heavily-guarded Pakistani capital Islamabad, police said.

Pakistan has been in the grip of a bloody homegrown Taliban insurgency since 2007 but attacks within the capital have been very rare in recent years.

Gunmen shot dead a Shiite Muslim scholar in central Karachi as he traveled on a busy road on Thursday, police said, in what appeared to be a sectarian attack.

Allama Taqi Hadi Naqvi, a cleric who was also an employee of the government educational board, was targeted as he returned home in a rickshaw.

Pakistan's fledgling peace talks with the Taliban suffered a fresh blow Friday as a negotiator for the militants said he would take no further part until the agenda included the imposition of Islamic sharia law.

The intervention from firebrand cleric Maulana Abdul Aziz comes a day after teams representing the government and Tehreek-e-Taliban Pakistan (TTP) held a preliminary round of talks in Islamabad.

A special court set up to try Pakistan's former ruler Pervez Musharraf for treason adjourned Tuesday to consider a medical report on his heart complaint.

The 70-year-old was rushed to the Armed Forces Institute of Cardiology in Rawalpindi, which borders Islamabad, on his way to the tribunal last week.

A lawyer representing Pakistan's former military ruler Pervez Musharraf said Sunday the retired general would not make a scheduled appearance at his treason trial on Monday because of an ongoing illness.

The 70-year-old was rushed to a military hospital on Thursday after developing what a police official called a "heart problem" while being taken to hear treason charges against him at a special tribunal in Islamabad.

Gunmen killed two senior members of a hardline Sunni Muslim group in a rare attack in the Pakistani capital on Friday, officials said, after weeks of sectarian tensions in the country.

The secretary-general of the Islamabad chapter of the Ahl-e-Sunnat Wal Jamaat (ASWJ) organisation, Mufti Muneer Muavia, and his colleague Qari Asad Mehmood were targeted in a residential area bordering the twin city of Rawalpindi.

Police in Pakistan's capital Islamabad foiled an attempted car bombing and seized an explosives-laden vehicle, officials said Saturday.

Sultan Azam, a senior police official, said the car was discovered at midnight Friday at a house in Bhara Kahu, a village on the northeastern outskirts of Islamabad. Police had raided the house after an intelligence tip.

Pakistani police snipers shot and seriously wounded a gunman who was tackled live on television by a politician during a dramatic standoff close to Islamabad's high-security political quarter.

The man, who was with his wife and children as he issued demands for the imposition of Islamic law, was said by doctors to be fighting for his life after the five-hour incident which shut down part of the city late Thursday.

A Pakistani anti-terrorism court on Saturday ordered former military ruler Pervez Musharraf to remain in custody for a further two weeks ahead of his trial for unlawfully sacking judges during his rule, officials said.

"Pervez Musharraf's remand is extended for judicial lock-up for 14 days, he should be presented before the court on May 18," Judge Kausar Abbas Zaidi, ordered.

A Pakistani-Canadian cleric told thousands of people Tuesday to carry on their protest in central Islamabad for a second day, after the government ignored his ultimatum to dissolve parliament immediately.

"I want to ask you to stay until tomorrow. I'm going to stay," Tahir-ul Qadri, 61, shouted while addressing the crowd after converging on the heavily fortified capital overnight.