Police are searching for a man who attempted to sexually assault a woman outside a church in Derry last weekend.
The woman, who is in her 20s, was followed by a youth who had struck up a conversation with her as she left a Holy Saturday service at St Columba's Long Tower.
When he tried to assault her, she fought him off by sticking her fingers in his eyes before fleeing.
Detectives have appealed for anybody with information to contact them.