Police said the forces burst teargas shells to control the agitators, who in turn used slingshots and catapults on them.
Both sides sustained minor injuries, police said, adding that the clashes took places after the end of the curfew relaxation hours at 12 noon.
Protest rallies defying the curfew were organised during the day across Imphal West district including at Iroisemba, Kwakeithel, Sagolband, Heirangoi Thong, Langjing Achouba and at Khundrakpam, Sekta, Keibi, Taret Khul, Sawombung, Chingarel, Lamlai, Khurai, Soibam Leikai, Nongmeibung, Chanam Sandrok, Langdum, Kongba Uchekon in Imphal East district, police said.
Meanwhile, the indefinite curfew, which was clamped on July 8 evening after a student lost his life during protests, would be relaxed for nine hours tomorrow beginning at 5 am, according to orders by the district magistrates of Imphal East and West.
There would, however, be restriction on gathering of more than five people and carrying of lethal weapons, the order issued during the day said.
Opposition MLA I Ibohalbi Singh of Trinamool Congress has demanded that the Okram Ibobi Singh government convene a special session of the house to discuss it.
The last session ended on July 10 and Joint Council on Inner Line Permit, which is spearheading the agitation, had been demanding that a bill for the implementation of ILP in the state be passed during it.
