NEW DELHI: Opposition BJP and UPA's outside supporter SP on Wednesday stalled Parliament over contradictory statements by defence minister A K Antony and Army over the killing of Indian soldiers on the Line of Control.

BJP demanded that Antony should apologise for "toeing the Pakistani line" when he stated that the 5 Indian soldiers were killed by 20 heavily armed terrorists and persons in Pakistani army uniform, while an Indian Army statement said the terrorist were assisted by Pakistan Army.

As the Lok Sabha met for the day, leader of the opposition Sushma Swaraj slammed Antony for giving Pakistan army a "clean chit" in the attack.

She said while an earlier statement by the Army and the defence ministry blamed terrorists and Pakistan army regulars for the attack, Antony said those involved in the incident were terrorists and people wearing Pakistan Army uniforms.

"The defence minister should apologise to the country," Swaraj said amid din over Telangana and law and order situation in West Bengal.

As Prime Minister Manmohan Singh was present in the House, Swaraj demanded a statement from him on the issue stating categorically that Pakistan army was involved in the attack on the Indian post in Poonch sector in Jammu and Kashmir.

In Rajya Sabha, members were on their feet the moment Chairman Hamid Ansari called the House to order.

M Venkaiah Naidu (BJP) said he has given a notice for suspension of Question Hour to raise the issue.

SP members joined Naidu in raising the matter during the pre-noon sitting.