The union home ministry has asked the states to remain alert and tighten security in sensitive places to foil any attempt to disturb peace during the forthcoming festival season, official sources said.
They said the ministry has sent advisory saying that terrorists may try to carry out attacks and all efforts should be made to prevent any such effort.
The advisory said that all efforts had to be made ensure communal harmony during the festivals and adequate security forces should be deployed at places where there was possibility of communal tension.
It said preventive arrrests should be made wherever necessary.