ISTANBUL — An eerie video emerged Tuesday of a man believed to be the attacker who killed 39 people in a mass shooting at a nightclub, showing him taking a selfie as he silently toured Istanbul's most famous square.

The camera never leaves the man's unsmiling face as he walked through Taksim Square during the 44-second clip that was broadcast on state-run Anadolu television and other Turkish media.

The gunman, who hasn't been publicly identified, remains at large, authorities said.

—Staff and news services