“A total of 12,872 migrants trying to cross into Greece from Turkey over the Aegean Sea were captured by Turkish Coast Guard Command teams in 524 separate incidents in 2014, while 74 people were also arrested on charges of smuggling migrants, Anadolu Agency has reported. The number of migrants who were captured in 2013 was 8,047, including 6,937 on the Aegean Sea. The total number of migrants captured by authorities across Turkey in 2012 was 2,531. The official number in 2011 was 546, which means that the number of captured migrants has increased 24-fold since then. …”
An unspecified number of the intercepted migrants were reportedly subjected to push-back practices where the affected migrants were returned to Turkish territorial waters [“Yasa dışı göçmenlerin bir kısmı da ‘geri atma olayı (gittiği ülkeden Türkiye karasularına geri gönderilme)’ olarak arz edilen olaylar sonucu yakalandı.”].
The push-backs were presumably carried out by Greek patrol boats or possibly by vessels operating pursuant to Frontex Joint Operation Poseidon Sea 2013 (which operated through 2014 Q1).