"We will raise the issue of Muzaffarnagar clashes in the Assembly tomorrow," state BJP president Laxmi Kant Bajpai told reporters here.
Leaders of other opposition parties also said they would vociferously raise the issue in both the Houses.
Asked about the Opposition's move to put the government on the mat on the Muzaffarnagar violence, Cabinet minister and SP leader Shivpal Yadav said these parties were devoid of any issue.
Chief Minister Akhilesh Yadav and Parliamentary Affairs minister Mohd Azam Khan did not attend the all-party meet.
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"It is for the first time that the Chief Miniser, who is the Leader of the House, was not present at all-party meet. This is an insult to the House, " BJP state chief said.
On Azam Khan, Shivpal said he would attend the House tomorrow.
Azam had recently skipped the SP's national executive meet drawing flak from party leaders.