DHAKA: Pakistan’s national television channel is back on air after security forces removed anti-government protesters from its headquarters in Islamabad.

Troops were sent in to regain control from demonstrators who had forced their way into the PTV offices.

Earlier, fresh clashes erupted between protesters and police in the capital.

Protesters loyal to opposition leader Imran Khan and cleric Tahirul Qadri want PM Nawaz Sharif to resign. He denies corruption and electoral fraud.

Both Khan and Qadri have urged calm and asked their supporters to co-operate with the army.

A number of policemen are reported to have been injured in Monday’s violence as thousands of demonstrators, some wielding batons and throwing stones, moved on the main building housing Pakistan’s federal bureaucracy and Prime Minister’s House.

Riot police were forced to retreat from the main road in front of parliament, Constitution Avenue.

Protesters attacked vehicles and set fire to shipping containers placed on the street as roadblocks.

BDST: 1427 HRS, SEP 01, 2014