A man and woman pushing a pram are alleged to attacked and racially abused a 15-year-old boy and his mother on the street in Heston.
Police said the attackers were pushing a baby in Vicarage Farm Road, when they turned on the mother and son – who are black – and rained down punches and racist abuse.
The incident happened on Saturday April 25 but after checking CCTV and the victim's statements, police are no closer to finding the culprits.
The boy was riding a bicycle on the pavement near the junction with Claypole Drive when he swerved to avoid the couple and ended up in the bushes. When he started to apologise, the man – who is described as being about 5ft 6ins and of Arabic appearance – racially abused and punched him.
The boy's mother tried to intervene, but the woman – who is described as being about 5ft 3ins and of Mediterranean appearance – attacked her, telling her to 'go back to your own country.'
The male suspect was wearing a 'Peach' branded t-shirt and light blue jeans, while the woman was wearing a light coloured top and green jogging bottoms.
Anyone who witnessed the attack or with information should contact PC Clair Kelly on 020 87219104.