Rao, who is the convener of OBC MPs forum, said here that extending reservation to new communities would lead to reduction of the quota for backward classes.
He alleged that the governments are accepting the demands for quota by "some upper castes" as they turned violent.
"What would happen if the backward communities, who are more in numbers, also hit the streets?" he asked.
The Gujarat government yesterday announced 10 per cent reservation for economically backward classes among upper castes.
