OMAHA, Neb. (AP) — Omaha police say a woman reported that she was gang-raped after a man she met on a smartphone dating app showed up to their date with his friends.

Police say the 22-year-old woman met the man on Tinder and invited him to her apartment on March 14. They say the man arrived at her residence with several other men and they all sexually assaulted her.

No arrests have been announced as of Wednesday.

An Omaha police spokesman said the incident is an important safety reminder for people who use online dating websites. He urges those who use the sites to meet people in a public place and recommends they tell a friend or relative the location of the meeting.