Mawlong Saw cum Veneer Mills, which is located below the scenic Umiam Lake, about 15 kilometer from here, was reduced to ashes when miscreants lobbed a molotov bomb late last night.
The firebrigade which rushed to the industrial park failed to douse the intensity of the flames.
An FIR has been lodged at the Umiam PS against unidentified miscreants by the MLA.
In a separate incident, unidentified miscreants hurled a petrol bomb at the chowkidar's quarter of the SDO Irrigation, Nongpoh in Ri-Bhoi district, police said.
A computer and windows were damaged by the fire even as the timely act of the chowkidar prevented the fire engulfing the entire room, they said.
In the wee hours today, a trucker was seriously injured when he jumped out of his vehicle on seeing that a petrol bomb was hurled.
There were reports of stone pelting and hurling of molotovs in Umsning, Byrnihat and other areas, police said. PTI JOP NIK