The Bihar government has decided to tighten security for Ministers, MPs and legislators in the state.AIR Patna correspondent reports that under new provision each Minister would have 16 policemen for their security while MPs and legislators would now have three bodyguards each. The body guards would be on duty in three shifts to provide security round the clock. Visitors would also be frisked.These steps have been taken in view of murder Purnia BJP MLA Rajkishore Kehari the last month.