A 54-year-old customer at McDonald's in Dumbarton was allegedly seriously assaulted on Friday night, report police.

A group of youths arrived at the restaurant around 7.30pm on October 8 and began causing a disturbance.

The victim received a cut to his head and a 16-year-old male youth has been reported to the procurator fiscal.

Police are continuing their enquiries to identify others involved and there will be extra patrols in the area.