Media outlets are reporting a late-night attack in Istanbul, Turkey where a gunman opened fire on a famous nightclub. Authorities have not yet released information about whether the gunman was captured or is on the loose.

CNN correspondent Ian Lee reported that police were prepared tonight, anticipating something could happen. CBS News reports that at least 35 people are dead, including one police officer, and dozens are injured. Approximately 800 people are thought to have been inside celebrating New Year’s Eve.

Private NTV television reported that some jumped into the Bosporus Strait trying to escape the gunmen.

Ortaköy'deki gece kulübüne düzenlenen saldırı sonrası ilk kareler https://t.co/LEJMTnvEku pic.twitter.com/Ifkf4iFAPO

— NTV (@ntv) December 31, 2016

Ortaköy'de gece kulübüne silahlı saldırı https://t.co/e8tIZntZXQ pic.twitter.com/3Be8ToHpsC

— NTV (@ntv) December 31, 2016

Turkish news site Son Dakika reported Saturday night that the gunmen were said to be wearing Santa Claus costumes.

Brief survalence footage shows a few seconds of the incident:

#Repubblica: "RT antoguerrera: 2. .MahirZeynalov: VIDEO: "One of the Istanbul shooters disguised as Santa". pic.twitter.com/W03eZ0y8nH"

— L'EDICOLA (@edicolaRT) January 1, 2017

Raw Story will bring you more information as it becomes available.