Scotland's policing watchdog has launched a third formal inquiry into chief constable Phil Gormley.

Mr Gormley is already the subject of two reviews by the Police Investigations and Review Commissioner (PIRC).

On Monday, the PIRC announced the chief constable now faces a third inquiry into allegations of gross misconduct.

Mr Gormley, who denies claims of bullying, has been on leave since news of the second investigation broke in September.

A PIRC spokesman said: "The PIRC is investigating further allegations of gross misconduct about the chief constable.

"Following a referral by the Scottish Police Authority (SPA) on September 27, the commissioner has assessed that the conduct which is the subject of the allegation would, if proved, amount to gross misconduct."

"As all three investigations are live it would be inappropriate to comment further at this time," he added.

Meanwhile, a fourth complaint has reportedly been made about Mr Gormley by a senior member of staff.

Under normal procedures, any complaint would be considered by the SPA before being passed to the PIRC if it was deemed serious enough.

Mr Gormley took over as chief constable following the departure of Sir Stephen House, who resigned in 2015 amid controversies over armed policing and the deaths of a couple on the M9.

The current chief constable has repeatedly refused to step aside, despite political pressure.

Deputy chief constable Iain Livingstone has assumed responsibility for Police Scotland's daily operations.