Greater Manchester Police say they were drafted in to cover a shortfall in Olympic security at a Worsley Hotel.
"On Saturday 14 July 2012, Greater Manchester Police became aware of a shortfall in security services for athletes participating in the 2012 Olympic Games.
"On Sunday 15 July 2012 a policing operation was set up by GMP officers to assist with the security operation to protect athletes staying at the main Olympic team hotel in Worsley.
"At no point was their a failure to provide security for the athletes.
"We have worked closely with the security contractor and the London Olympic Games Organising Committee (LOCOG) in relation to this matter, as we have throughout the planning phase of the Olympic Games.
"Extra policing resources have had to be called in, but there has been a minimal impact on policing the local communities that we serve on a daily basis."
A Merseyside representative of retired police has attacked G4S, saying the security firm told them they are "surplus to requirements".
Armed police have been called in to plug a shortfall in security at a hotel used by Olympic athletes in Manchester.