The Pakistani government has been thrown into disarray after the removal of immunity for politicians and government officials.

Pakistan's interior minister Rehman Malik has been summoned to appear in court on corruption charges and is scheduled to appear in court next month.

More than 250 Pakistani politicians and government officials are facing possible prosecution.

Mr Malik is one of the most high profile government ministers accused of corruption.

On Thursday, the Defence Minister Ahmed Muktar was also prevented from leaving the country because of a police order.

Dozens of cases have been reopened after the Supreme Court overturned immunity granted to politicians and government officials.

The special protection was introduced in 2007 by former President Pervez Musharraf, to allow the return of former Prime Minister Benazir Bhutto.

Opposition activists are calling on the President Asif Ali Zadari and his government to resign.

But Mr Zadari has dismissed the demands.