Several Opposition leaders on Monday visited the Duttapukur fireworks unit blast site and blamed the Mamata Banerjee government for the incident.

Sunday's blast at the illegal unit's stockyard in Duttapukur's Mojpole village has claimed nine lives so far. The chief minister ordered a thorough probe into the matter.

Suvendu Adhikari, the leader of the Opposition, on Monday demanded a statement from Mamata in the House on the issue. He placed a motion to adjourn the business of the Assembly.

Speaker Biman Banerjee allowed the Nandigram MLA to read the motion but refused to admit it. An irate Adhikari led BJP lawmakers into a sloganeering spree that went for about 11 minutes inside the House and then walked out.

"The chief minister doesn't come to the House. We demand a statement from the government on this incident.... In the last six months, 100 persons have died in similar blasts. Such incidents have taken place in several corners of the state, from Dubrajpur to Egra," Adhikari told newspersons outside the Assembly.

The Nandigram MLA said that after the Egra blasts in May this year, Mamata had ordered a committee with the chief secretary at its helm to curb illegal firecracker factories. "What work has the committee done till now?" Adhikari asked.

Later, Adhikari and a group of BJP MLAs visited the blast site at Duttapukur and met the people to hear out their grievances. He then addressed a public gathering near the site.

CPM's state secretary Md Salim and some of his party colleagues also visited the blast site on Monday. Salim also met the injured at a local hospital. He said several bodies could not be identified as they were blown to pieces.

"So far Mamata Banerjee would instruct her police to fabricate cases. Now she may need to ask them to fabricate bodies as no one can match the pieces," he said.

"The role of the police remains questionable.... They are trying to erase and tamper with evidence. They are now attacking common people of the area had who protested against this illegal factory," he alleged, adding hundreds of such units needed to be closed.

Adhir Ranjan Chowdhury, the state Congress chief, also went to the Duttapukur blast site, holding Mamata and her police administration responsible for this incident.

"The police and Trinamul leaders extort money from such factories and allow them to run in spite of them being illegal," he alleged.