Police detained on Monday a female suspect that allegedly planted the bomb on a pedestrian avenue in Istanbul on Sunday.
Footage released by the Turkish security forces shows what is said to be the arrest of the main suspect from a property she was allegedly hiding in.
Reportedly 21 other people were also arrested for questioning.
According to Turkish Interior Minister Suleyman Soylu, initial findings pointed that Kurdish militants were responsible for the deadly attack.
At least six people were killed and more than 80 left injured in an explosion in the iconic Istiklal Avenue, a busy pedestrian street in the historic center of Istanbul on Sunday.
