The Ghaziabad police busted a sex racket and arrested four call girls from the Nandgram area on late Wednesday night. The raid was carried out after the police received a tip off, said a police officer. Officials said that these arrests are a part of the special focus on the growing flesh trade in the region. The four women arrested — Neelima, Riddhima, Sheila and Rekha — had been involved in the trade for many years now, said police. Senior Superintendent of Police of Ghaziabad Deepak Ratan had supervised the raid. “We are hoping to get more links by interrogating the arrested women and more such rackets will be busted soon,” said Ratan.