Sources in the police department said that so far, the list of all prohibited items has not been finalised but there is a proposal to ban coins at the Games venues.
Coins were prohibited earlier this year during the trial events for various Commonwealth Games events. In all, 39 items, including coins, were prohibited at the World Cup Hockey Tournament held in March this year.
"We cannot take risks as far as security is concerned and coins can be used to assault anyone if thrown from a distance," said a senior police officer on condition of anonymity.
Police said they are expecting maximum number of spectators and crowd during the opening and closing ceremonies of the Commonwealth Games on October 3 and 14 at the Jawaharlal Nehru stadium.
"There would be no facility to store the prohibited articles confiscated by the police. So we would not be able to return the prohibited stuff," said the officer.
Police said they were still mulling over the idea to ban mobile phones at the Games venue. The Ministry of Home Affairs (MHA) is yet to take a decision to install mobile phone jammers at the venues.
"The decision to ban mobile phones was successfully implemented during the Hockey World Cup Matches in March this year. But how far it would be feasible for the Games is yet to be finalised," said the officer. Seemingly harmless objects such as balloons, paper envelopes and feeding bottles will also not be allowed at the venues.