Turkish police have detained 20 Daesh suspects on Wednesday in the western city of Izmir in connection with the armed assault in an Istanbul nightclub which killed 39 people and wounded 65 on New Year's Day.
Turkish anti-terror teams conducted an operation in four addresses in Izmir's Bornova and Buca districts.
Twenty suspects have been detained over the attack so far, which Daesh has claimed, while NTV reported that two foreign nationals had been detained at Istanbul's main Ataturk airport.
Of the 20 suspects, 11 are women from Dagestan, East Turkestan and Syria.
A sniper rifle, night vision binoculars, bandoleer, backpack, GPS and other military equipment were seized.
The suspects allegedly stayed with the gunman at the same terror cell in Konya.
Security forces are narrowing in on the Daesh terrorist who opened fire on New Year's Eve revelers at Istanbul's Reina nightclub in Ortaköy.
The gunman, who fled after the attack by blending into the crowd of fleeing victims, remains at large.
Authorities have released security camera images of the alleged killer, who shot dead a police officer and civilian outside the venue on the European shore of the Bosporus before entering and opening fire on New Year's Eve revelers.