India, July 10 -- At least four alleged gangsters were killed and four others, including three police personnel, were injured in a fierce exchange of fire with the police in Gurugram's upscale Sushant Lok Block A area in Sector 28 late Thursday, officials said.

Police said five armed men allegedly linked to the Deepak Nandal gang had arrived in a black Scorpio to open fire on the house of a businessman in an attempt to terrorise him over an extortion demand running into several crores of rupees.

DCP (Crime) Hitesh Yadav said the police control room received information from a local resident at around 9.20pm about the suspicious movement of a vehicle carrying armed men, following which Crime Branch teams were immediately dispatched.

"Th...