At least 25 dead after fire in Istanbul nightclub. Construction work is suspected to be the cause and arrests have been made.

The fire broke out in the midday hours on the lower floors of a 16-story apartment building that was used as a nightclub. The exact cause remained unclear, but the fire could have been started during repair work, it was said. Five people have already been arrested, CNN Türk reported. The public prosecutor's office has initiated an investigation. The building is located in the Besiktas district of Istanbul.