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Two police officers are at the centre of a gross misconduct inquiry over an allegation they had sex with each other on duty.

Sussex Police said both officers were being investigated by its professional standards department.

The Argus is reporting that those involved are a

A force spokesperson said: "Neither of the officers have been suspended."

Last week, it emerged another Sussex officer, Brighton-based Insp Tony Lumb, had been arrested and bailed over claims of improper conduct with women.

That case is being investigated by the Independent Police Complaints Commission (IPCC).