People were evacuated from a Delhi Metro station and two markets in posh areas of Gurgaon after police received bomb threat calls, officials said.Train services were affected for over one-and-half hours after a bomb threat at the HUDA City Centre station, police said.The station was emptied for a search operation after the police control room received a call that said a bomb was planted in the station's basement.Commuters were not allowed to enter the station as police launched a search operation around 3.30 p.m.However, trains operated as usual from the IFFCO Chowk station towards Delhi.Bomb threat calls also forced police to clear out people from the Vyapar Kendra in Sushant Lok area and Galleria Market in New Gurgaon.Police commandos tried to find the bombs as claimed in the threats.A police officer told IANS that no explosives were found.