Posters put by an outfit in Jharkhand's capital Ranchi have threatened acid attacks on girls and women who wear jeans or do not wear a dupatta.
The police said it could be a case of mischief.
The handwritten posters have been put up by Jharkhand Mukti Sangh at several points in the city. They read: "From 20/8/2012 (Aug 20), jeans have been banned for girls. Any girl will be found wearing jeans and moving without dupatta will be attacked with acid."
The poster also warns against displacing people for industrialisation. "Companies involved in land acquisition will be attacked," it said.
"We have heard about about this outfit for the first time. This can be a case of mischief. We are trying to trace the people involved," a police officer said.