Scottish police officers were found to have carried out 11 assaults and four crimes of indecency last year.

New figures on public complaints show that the allegations were upheld out of thousands of others that were not substantiated or dismissed.

Only one of the 11 assaults were dealt with by a criminal disposal, meaning the matter was dealt with by prosecutors and the courts.

The other 10 resulted in internal disciplinary actions, according to officials statistics lodged with the new national force's watchdog, the Scottish Police Authority (SPA). All allegations were made against on-duty officers.

Another 431 allegations of assault against officers on duty were abandoned, dismissed or not upheld for a variety of different reasons. There were more than 7000 allegations investigated against on-duty police officers in 2014-15. Only 13.7 per cent were upheld.

All four crimes of indecency - a wide category that includes everything from kerbcrawling to rape - lead to criminal proceedings. It is not clear whether the allegations were made about one officer or several. But whoever was responsible was off-duty at the time.

SPA documents show the number of complaints filed against officers soar last year as the new force standardised procedures for dealing with grievances from the public.

New teams have been set up to resolve and investigate complaints, many of which will contain more than one allegation.

The total number of complaints was 5,678, up 1,048, or 22.6% compared with 2013/14. Complaints in the West - the old Strathclyde and Dumfries and Galloway forces - rose even faster, by 43 per cent. They were up 25 per cent in the east but down in the north.

A spokeswoman said: Police Scotland expects all officers and staff to carry out their duties to the highest possible professional standards.

As such, any incident which results in a complaint is treated seriously, with the appropriate investigation carried out.

A spokeswoman said:

"Complaints against the police are kept under review and are regularly monitored to ensure we identify quickly any emerging patterns or issues, and where possible lessons are learned.

"The current figures are an accurate reflection of complaints across the country."