Officials and media reports say a teenager wearing a helmet and bulletproof vest randomly stabbed five people at an open-air cafe in northwest Turkey before being detained by police.

A teenager wearing a helmet and bulletproof vest randomly stabbed five people at an open-air cafe in northwest Turkey before being detained by police, officials and media reports said Tuesday.

The 18-year-old, identified as Arda K., broadcast Monday’s knife attack on social media through a camera attached to his vest, HaberTurk television reported. The victims were people relaxing after prayers at a mosque in Eskisehir, some 230 kilometers (143 miles) west of the capital, Ankara.

The teenager was detained following a police chase, according to the Eskisehir governor’s office.