A further 12 fans have been arrested in dawn raids after the pitch invasion at the Scottish Cup final at Hampden.

Around 30 officers were involved in dawn raids at homes in Glasgow, Fife and Edinburgh targeting those involved, bringing the total number of people arrested to 27.

Police arrested a total of 15 people in and around Hampden on the day of the Rangers v Hibernian cup clash in Glasgow on Saturday, May 21.

Fighting broke out after Hibernian's 3-2 victory, with thousands of fans invading the pitch, and widespread disorder forcing police to call officers in on horses to help disperse the crowd.

After the activity on Thursday morning ten men, aged between 17 and 50, were arrested and detained in police custody for a number of offences including alleged assault, vandalism, disorder and antisocial behaviour.

A further two men, aged 18, are the subject of a report to the procurator fiscal in connection with alleged disorder and assault at the game.

The 17-year-old was arrested in connection with an alleged assault on Rangers goalkeeper Wes Foderingham on the pitch at the national stadium.

The detective leading the operation emphasised the new arrests are just the "first phase" of the large-scale investigation as he expects more arrests to take place in the coming weeks.

Detective superintendent Kenny Graham said: "This is a large-scale investigation into the multiple acts of violence, disorder and vandalism, involving large numbers of people which occurred in the aftermath of the Scottish Cup Final.

"I have a team of officers which has been working extensively to identify those individuals involved in violence and disorder, regardless of the colour of their scarf.

"Let me be very clear about this investigation; it is wide-ranging but utterly focused on those involved in violence and disorder.

"Due to the significant number of people concerned, there are three distinct phases to the investigation. Firstly focusing on those involved in the most serious acts of violence, then those involved in disorder and lastly those embroiled in acts of vandalism such as wrecking signage and goalposts.

"Identifying those concerned takes time but be in no doubt, if you were involved in these acts of disorder, expect a police officer to be knocking on your door."

Officers have been reviewing hours of CCTV and television footage, photography and material from social media.

The force said significant work is being carried out by a dedicated team of officers who are analysing footage from cameras in the stadium and television production shots to identify those responsible for the disorder within the stadium at Hampden.

Already 16 arrests in relation to 15 people were made in the first week following the match for a range of crimes including assault.

One person was charged with a number of separate assaults, one of which is allegedly on a woman and another where he allegedly used a chair. Individuals believed to have allegedly assaulted Rangers players and staff have also been arrested.

Seven of the men were arrested and detained in police custody on Thursday for alleged assault and disorder on the pitch in contravention of the Offensive Behaviour at Football (Scotland) Act.

A 34-year-old man was arrested and detained in police custody for alleged vandalism and  disorder on the pitch in contravention of the football act as well and an offence under the Child and Young Persons (Scotland) Act.

One man, aged 18, is the subject of a report to prosecutors in connection with assault and disorder on the pitch and another man of the same age has been reported for disorder.