NEW DELHI: Lok Sabha proceedings were adjourned till 11.30 am on Thursday as the Opposition protested over rising prices and the Enforcement Directorate summons to Congress president Sonia Gandhi for questioning in a money laundering case.

As soon as the House met for the day, Opposition members sought to raise various issues and began shouting slogans.

Some Congress members displayed placards saying "Satyameva Jayate" with a photograph of Sonia Gandhi.

The Congress president has been summoned by the ED on Thursday for questioning in a money laundering case related to the National Herald.

Opposition members also protested against price rise.

As the din continued, Speaker Om Birla adjourned the proceedings till 11.30 am.

Similar scenes remained in Rajya Sabha as well proceedings were adjourned for about an hour on Thursday as opposition parties led by Congress tried to raise the issues of price rise and levy of Goods and Services Tax on daily essentials.

Opposition party MPs carried placards with slogans against price rise and GST, and with prices of essential goods before and after the Modi government came to power.

Chairman M Venkaiah Naidu ordered that those carrying placards and other articles should be named in the House Bulletin with remarks that the Chair disapproved of their actions.

Later, he adjourned the proceedings till 12 pm.

The first three days of the monsoon session of Parliament have been washed out amid opposition protests.

Thursday appeared no different with not even official listed papers laid on the table of the House.

When the House assembled for the day, Naidu greeted Leader of the Opposition Mallikarjun Kharge on his 80th birthday.

Thereafter, Dharmasthala Heggade took oath as a member of the Upper House of Parliament.

Soon after, opposition MPs were up on their feet trying to raise the issue of price rise and levy of GST on essential items like wheat, rice and curd.

Some carried placards and others packets of items on which GST was levied from July 18.

"No placards, no articles," Naidu said.

"I have to name those people. I order that names of those carrying placards should be mentioned in the House Bulletin and also mention that the chairman stated that this act was objectional."

As MPs started to move towards the well of the House, he adjourned the proceedings till 12 pm.

Meanwhile, various opposition parties on Thursday accused the Modi government of unleashing a relentless campaign against its political opponents through "mischievous" misuse of probe agencies.

Ahead of Sonia Gandhi's questioning by the ED, leaders of 13 political parties met at Parliament House and condemned the action.

"The Modi 'sarkar' has unleashed a relentless campaign of vendetta against its political opponents and critics through the mischievous misuse of investigative agencies. Prominent leaders of a number of political parties have been deliberately targeted and subjected to harassment in an unprecedented manner," the leaders charged in a joint statement.

"We condemn this and resolve to continue and intensify our collective fight against the anti-people, anti-farmer, anti-Constitution policies of the Modi 'sarkar' that is destroying the social fabric of our society," they also said in the statement.

Leaders of the Congress, DMK, CPI-M, CPI, IUML, NC, TRS, MDMK, NCP, VCK, Shiv Sena, RJD and RSP were present in the meeting.