Teams from the anti-terror branch of the Istanbul Police Department have detained two ISIS suspects during an operation in Istanbul's Kağıthane district.

Axar.az reports that according to police sources, the two ISIS suspects C.C. and I.D., who hold Uzbekistani citizenship, were planning a "major attack similar to the Reina nightclub."

During searches in the ISIS cell house, police teams seized two Kalashnikov rifles with two full chargers with 500 bullets, and numerous digital and written documents containing information about the terrorist group.

The detained suspects were brought to the Istanbul Police Department's anti-terror bureau for further procedures.

A lone ISIS gunman armed with a Kalashnikov had gunned down 39 revelers in the nightclub by the Bosporus shore during a New Year's party. The gunman was captured after a few weeks on the run.

Since it emerged as a major threat in unstable Iraq and war-torn Syria a few years ago, ISIS has carried out a string of attacks in Turkey, which it includes in its list of foes. Some 277 people were killed in Daesh attacks.