Ahead of the Noida Supertech twin tower demolition at 2.30 pm today, the police have put a host of contingency plans in place to avoid any mishap. Noida senior cop Rajesh S said all roads leading to the twin towers have been closed and a 450 metre explosion zone has been created. Additionally, seven CCTV cameras have been installed for monitoring and two National Disaster Response Force (NDRF) teams have been kept on standby. The police have also set up a mini control room 450 metres away from the towers.