A MAN has been arrested after a 20-year-old woman was sexually assaulted in an alleyway off Southfield Road, Oxford, at about 2am today.

The woman was walking along the Cowley Road when a man came up to her from behind, threatened her and forced her into an alleyway off Southfield Road and assaulted her.

Det Insp Kev Elkins said: "We have arrested a 42-year-old man in connection with this assault, but I am appealing for anyone who may have seen a dark green 4x4 in the Cowley Road area or any of the adjoining roads last night to contact the police."

Anyone with any information about this incident is asked to contact Det Insp Elkins at Oxford police station via 0845 8 505 505, or if you do not want to talk to the police or give your name, call the Crimestoppers charity on 0800 555 111.