The 17-year-old, who is also from Dewsbury, was arrested back in April under Section 5 of the Terrorism Act.
A spokesperson for the North East Counter Terrorism Unit said today that the boy “has been released from his bail and no further action will be taken”.
The teenager’s arrest on April 4 was part of the search for Hassan Munshi and Talha Asmal - the 17-year-old Dewsbury teens who are thought to have fled to the war-torn country after travelling to Turkey on March 31.
The two boys were last seen by their families on March 31 when they are believed to have flown from Manchester to Dalaman. Hassan - a former pupil of Dewsbury’s Westborough High School - and Talha - a pupil at Mirfield Free Grammar’s sixth form - are now thought to have crossed the border into Syria.
West Yorkshire Police and the North East Counter Terrorism Unit said they were “extremely concerned” for the safety of the two teenagers and urged anyone with information to come forward.