Documents, digital material and ammunition were also seized during the raids, according to the interior ministry.
Police identified the suspect as Abdulgadir Masharipov. He along with four others was taken into custody at a residential apartment on Monday.
Police identified the suspect as Abdulgadir Masharipov, who is believed to be responsible for killing 39 people at Reina nightclub in Istanbul.
Foreign Minister Mevlut Cavusoglu did not give the name of the assailant who shot and killed 39 people on New Year's Day.
Fikri Tosun, 21, luckily survived after he was hit in the leg and the arm by the Reina shooter who killed 39 people and injured dozens more.
Police have carried out raids across Turkey and detained at least 14 people in the search for the assailant who killed 39 people at the Reina nightclub on New Year's Day.
Police have released new images and video of the suspect and say they are close to identifying him.
"He was shooting us on the floor," survivor says, explaining how the gunman deliberately took aim at victims.
The attacker is still on the run. But, police say that they have found the taxi he took to the nightclub and are dusting for fingerprints.
A manhunt continues for a lone gunman who stormed the Reina nightclub while it was packed with revellers celebrating the New Year, killing at least 39 people.
President Erdogan says Turkey will fight to the end against armed, economic, political and social attacks and the forces behind them.
The assailant shot dead a police officer and a civilian as he entered the Reina nightclub before opening fire at random inside.
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