Mumbai : Security at the World Trade Centre in downtown Mumbai was scaled up Wednesday after police received an anonymous letter threatening to blow up the twin towers on Thursday.
The letter was received by the World Trade Centre at south Mumbai's Cuffe Parade area Tuesday and sent to the police commissioner's office.
"The letter threatened to blow up the twin towers on May 24. It did not give any specific reason for blowing it up," said Deputy Commissioner of Police (Zone-I) Brijesh Singh.
"Following the threat, we have beefed up security in and around the twin towers and are also conducting a through search of the premises. We are keeping a close watch on people visiting the buildings. We are not taking any chances," Singh told IANS.
"We are trying to ascertain where the letter was sent from. Specific security drills have also been put into play."
The WTC, which houses leading financial and investment institutions and other business houses besides several government offices, is situated in the business hub of the country's financial capital close to the famous Gateway of India.
One of the towers has 27 floors while the other 35 floors.
Police has been on alert after the bombing of the 400-year-old Mecca Masjid in Hyderabad last week that killed 16 people.
Besides, memories of the terror attack on the city's suburban railway network last July 11 are only too fresh. Nearly 200 people were killed when a series of blasts ripped though the first class carriages during evening rush hour.