An 11-year-old girl was allegedly raped at Goa's Colva beach by a 20-year-old man, police said on Wednesday.

Police said the girl was waiting for a bus near Colva beach - 40 km from here - with her elder sister, also a minor, Tuesday night when the accused offered them sweets. He then took them to the beach and raped the 11-year-old girl behind a bush.