Police are hunting two people after a 61-year-old man and his son were seriously assaulted on a bus.
The man and his 23-year-old son were travelling from the east end of Glasgow towards the city centre on Monday at 11.45pm when they were attacked.
The older man had his face cut, and later required surgery, and his son also needed treatment.
A man and woman got on the number 61 bus in Helenvale Street near Tollcross Road when an argument broke out between them. The two victims were then both attacked by the man who used a bottle as a weapon.
All four people got off the bus in Bellgrove Street, and the male attacker headed towards Millroad Gardens while the female walked east along the Gallowgate.
Detective Constable Jim Mitchell, of London Road CID, said: "This was a terrifying experience for the men, a father and son, who were simply making their way home from a night out when they were viciously attacked by a man. This attack has left the 61-year-old potentially scarred for life.
"We are carrying out door-to-door enquiries and checking all available CCTV but we would like to trace anyone who may have been on the bus or around the local area at the Wee Man's on Gallowgate who may be able to assist us with our enquiries."
The male attacker is aged between 20 and 30, 5ft 10in and very slim. He has short, spiky hair which was greying and he wore dark-framed glasses, tight clothes and a grey hooded top.
The female attacker is around the same age, 5ft 2in and stout. She had long dark hair in a ponytail and wore a dark hooded zip-up top and black jeans.