There is still no murder weapon and no suspect in the killing of French student Sophie Collombet in Brisbane.

A Frenchman found out his girlfriend Sophie Collombet had been murdered after recognising her jewellery in pictures that Brisbane police had posted online.

The man, known as Boris, called local police to tip them off from France after seeing the photos, the Courier-Mail reports.

The 21-year-old university student’s naked body was found bashed in a rotunda in South Brisbane early on Friday morning.

Police still haven’t found a weapon or her clothes, and have no suspects.

Friend Roselyne Trott said confirming her murder later with Boris had been hard.

“I heard a very weak `OK’ but nothing came out of his mouth. Nothing at all, he couldn’t talk,” she told the Courier-Mail.

Griffith University is working with the French consulate to provide support to her family and counselling to friends.

Ms Collombet is the fourth young foreigner murdered in Brisbane in recent months, but Queensland Tourism Industry Council chief executive Daniel Gschwind said visitors had nothing to fear.

He said there was a difference between random acts of violence and the directed violence Indian students experienced in Melbourne a few years ago.

“There’s clearly nothing systemic going on here. This is a tragedy and we have to show compassion,” Mr Gschwind told ABC Radio.

Comment has been sought from the French consulate.