The government of London said it has referred Prime Minister Boris Johnson to Britain's police watchdog for potential investigation over allegations of misconduct involving a U.S. businesswoman while he was mayor of London.

The Greater London Authority (GLA) said Friday it had referred a "conduct matter" concerning Johnson to the Independent Office for Police Conduct (IOPC), which investigates complaints connected to the police.

The referral follows allegations, first reported by The Sunday Times, that when Johnson was mayor, he failed to declare close personal links to tech entrepreneur Jennifer Arcuri who received thousands of pounds in public business funding and places on official trade trips.