Pakistan Muslim League-Nawaz (PML-N) MNA Mian Javed Latif was injured in an attack in Sheikhupura by men protesting against the crackdown.
Media reports quoted an interior ministry order, which authorised the deployment of "sufficient" military troops in Islamabad to "control law and order" in the city until further notice. Reports say scores of protesters and police personnel have been injured in the clashes.
The protesters, belonging to the Tehreek-e-Labbaik, broke into and ransacked the minister's haveli, Express News reported.
In a dramatic move, Pakistan's government late Saturday called in the army to secure the capital following an eight-hour crackdown against violent protesters.
By midday, TV coverage had been cut off and private channels were off the air by orders of the official media regulator. "Suggested to handle Islamabad Dharna (sit-in) peacefully avoiding violence from both sides as it is not in national interest and cohesion", said spokesman Major General Asif Ghafoor.
Ahsan Iqbal said the protesters wanted to replicate the Lal Masjid and Model Town type incidents, but the government was showing restraint to resolve the issue amicably.
Courts Blast Government Over Protest Paralysis
Hundreds of supporters of Tehreek-e-Labaik Ya Rasool Ullah being led by firebrand cleric Khadim Hussain Rizvi have been blocking Faizabad Inter-Change for almost three weeks.
There are prison vans, ambulances at the site.
The protestors demand that Federal Law Minister Zahid Hamid step down for his alleged role in a recent amendment which now stands withdrawn. Helicopters and drones are being used by the authorities for aerial surveillance. Protesters, some wearing gas masks, fought back in scattered battles across empty highways and surrounding neighbourhoods. Furthermore, the operation was initiated over the orders of the Islamabad High Court. Lahore's entry and exist points have been blocked by the protesters.
Apart from the capital, protests are reportedly taking place in the southern Pakistani city of Karachi and northern district of Sialkot. Traffic jam has choked arteries near Data Darbar.
News media also reported protesters breaking into the house of former interior minister Chaudhry Nisar Ali Khan.