Police say they are studying CCTV footage from a football ground where three fans were arrested at a youth cup final between Glasgow rivals Rangers and Celtic.

Last night's Glasgow Cup under-17s fixture at Firhill, the home of Partick Thistle FC, was the first meeting of the Old Firm since Rangers were liquidated and effectively relegated to the Third Division.

Kick-off was delayed as supporters set off flares and smoke bombs and damaged seats in the stands. Some fans also invaded the pitch.

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Police Scotland said three arrests were made at the game which Rangers won 3-2.

Two 17-year-old boys were arrested inside the ground over an alleged pitch invasion and a 19-year-old man was arrested outside the stadium in connection with a minor assault.

A report will be sent to the procurator fiscal.

About 6,000 people attended the match.

Both clubs say they are helping police with their investigation.

A Celtic spokesman said: "We are looking into last night's match in more detail, together with all the relevant authorities, and clearly will deal with any issues appropriately."

A Rangers spokesman said: "It is disappointing that the off-field incidents at the Glasgow Cup Final last night detracted from a good game of football and a terrific result for the Rangers under-17 team. The club will assist the police with all their inquiries."