A woman was sexually assaulted by a group of three or more men in Palmerston North last night.

She was seriously injured and was admitted to Palmerston North Hospital.

Police are this morning examining two scenes, one of which has been guarded overnight, and speaking to witnesses who have been in contact with the victim in the hours leading up to the attack, which happened at around midnight in the Highbury area.

Anyone who has any information that may help identify the attackers is encouraged to contact Palmerston North Police on 06 351 3600.