Unidentified persons lobbed a molotov cocktail at a BJP office here partially damaging it, a police officer said on Monday. No casualty was reported in the explosion. An investigation has been initiated, said East Khasi Hills SP Davis N.R. Marak.“Unidentified men attacked the front portion of the office partially damaging it. The incident was reported around midnight,” BJP state president Shibun Lyngdoh said. The office does not have CCTVs installed and hence it is up to the police to identity the assailants, he said. Meanwhile, the Meghalaya unit of the BJP has condemned the attack and requested the police to tighten security in all its offices across the State.“The State unit of the BJP has strongly condemned the act of arson in its State headquarters at Bivar Road,” BJP Minister A.L. Hek said in a statement. An FIR was lodged and copies of it were also sent to the Chief Minister and Home Minister requesting stern action against those involved, he said.