Police has seized mephedrone valued at Rs 2.42 crore and arrested a man for allegedly manufacturing the narcotic substance at his house in Palghar district in Maharashtra, an official said on Saturday, PTI reported.

A police team raided a house in Palghar's Boisar area on Friday, based on a tip-off and seized mephedrone as well as the equipment used in manufacturing the substances, Deputy Superintendent of Police Vikas Naik said.