Police are looking for a man who shouted racist abuse at two children as they were walking to school.
The incident is being treated as a hate crime.
The teenagers were verbally abused on Vauxhall Street just before 8 o'clock on Tuesday morning.
The man is described as being white, in his 30s, with dreadlocks and wearing a high-vis vest.
He was with two other men and a dog.
Officers want to hear from a woman walking nearby at the time who was also the victim of racial abuse.
Anyone with information is asked to call 612612 or contact Crimestoppers anonymously.

Princess Anne unveils new portrait of King Charles and Queen Camilla
What to expect from Bergerac Series Two
Lee Ingram appointed JFA President
Economists warn Jersey's government to save more money
Trash the trimmers, try a tash!
Man investigated for indecent exposure and urinating in the street
Guernsey could be disgraced Andrew’s new home - Royal biographer
Government appoints new Havre Des Pas Lido operator