Christchurch police are hoping the public can help them catch a man who sexually violated a woman in Christchurch.

The attack happened about 11pm on Saturday, 12 March, on Ilam Fields, directly opposite the University Canterbury campus.

Police say the attack happened during a party that was happening on the other side of the fields near the University halls of residence.

A least 200 people attended.

Police say the victim met a man at the party who seemed friendly enough and offered her a drink from a Pump bottle.

“I thought he was a nice guy, introduced himself and said hi. I didn’t see anything wrong with him whatever” the victim told police.

Believing it to be water, she accepted, but soon began to feel unwell.

She’s made her way over to the bushes to vomit, now thinking the drink to be spiked.

The man followed her and refused her request to leave.

He then became violent, dragged her behind a bench and violated her.

The man then left and his movements from there are unknown.

He is described as in his 20s approximately 183cm / 6ft, very fair skin, with some stubble, short, dark brown hair which may have been recently cut. A “rugby type” nose which looked swollen. He had very thick, defined eyebrows and a tattoo or mark on the left side of his neck

“Finding the person responsible will give the young woman her sense of safety back and help ensure nothing like this happens to anyone else. If you can help, then get in touch on 0800 107 INFO.”