New Delhi, May 6 (IANS): Both houses of parliament were Monday adjourned till noon as the BJP persisted with its demand for Prime Minister Manmohan Singh's resignation over irregularities in the allocation of coal blocks and other issues.

The Lok Sabha was adjourned minutes after the day's proceedings began at 11 a.m. as Bharatiya Janata Party members advanced to the speaker's podium demanding the prime minister's resignation over the issue.

The BJP also demanded resignation of Law Minister Ashwani Kumar and Railway Minister Pawan Kumar Basal.

Speaker Meira Kumar's efforts to calm BJP members proved futile and she adjourned the house till 12 noon.

The scene in the Rajya Sabha was similar with BJP members shouting slogans against the prime minister.

Amid the pandemonium, Chairman Hamid Ansari adjourned the house till noon.

Both houses have seen repeated disruptions by opposition parties over the allocation of coal blocks and 2G spectrum.

The BJP has said it will not let parliament function till Manmohan Singh resigns over the alleged involvement of his office in the irregularities in the allocation of coal blocks and 2G spectrum.