The Congress on Sunday demanded a thorough probe into Siddique's murder and said Maharashtra Chief Minister Eknath Shinde and his deputy Devendra Fadnavis, who holds home portfolio, should take moral responsibility for law and order "failure" and resign.
According to the sources, it was decided that the MVA will hold revenue division-wise rallies where leaders of all the three Opposition outfits will participate.
Tension brewed in parts of Mumbai and adjoining Thane districts on Wednesday following Tuesday's incident of stone pelting on Raj Thackeray's convoy by alleged Nationalist Congress Party workers in Ahmednagar district, with Maharashtra Navnirman Sena supporters attacking NCP office in Ambernath and calling a bandh.