Clashes between security forces and protesters have continued for a third day in the Pakistani capital Islamabad.
The army has denied suggestions it is backing anti-government groups, insisting it is “apolitical”.
Earlier Pakistan's national television channel was briefly taken off air after anti-government protesters stormed its headquarters in Islamabad.
Troops were sent in to regain control from demonstrators who had forced their way into the PTV offices.
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 called for calm and asked their supporters to co-operate with the army.
On Monday the army's public relations wing issued a statement in which it "categorically rejected" that it was supporting either Khan or Qadri.
In a statement, it said the army was “an apolitical institution and has expressed its unequivocal support for democracy at numerous occasions”.
The statement comes after a senior figure in Khan's PTI party, Javed Hashmi, claimed Khan had told senior party members that the army and intelligence services were ready to help him and Qadri topple the government.