New Delhi, July 1 (IANS): Disruptions are expected in the upcoming monsoon session of parliament as major opposition parties appear united over the Lalit Modi issue, CPI-M general secretary Sitaram Yechury said on Wednesday.

"Since all the major opposition parties have come out against the Lalit Modi issue, there is going to be uproar on the issue in the session coming ahead," Yechury said during an interaction with journalists at the Indian Women's Press Corps (IWPC).

"After all, the present finance minister (Arun Jaitley) had said disruptions are a democratic method for opposition," he said.

"There should be thorough inquiry in all these allegations. Unless the inquiry is over, they must not be holding public offices," Yechury said in oblique reference to External Affairs Minister Sushma Swaraj and Rajasthan Chief Minister Vasundhara Raje, who are alleged to have helped Lalit Modi.

"In similar cases in the UPA, they (BJP) said 'investigate and take action'... This case should be investigated. What compromises were made should be known," he said.

The Left leader said the way the government has been surpassing parliament in legislative business was a very big threat.

"It is a very big threat... they are depriving the lawmakers of their work," Yechury said.