The 21-year-old woman, identified as J.N.H., was detained at a bus terminal in the Turkish capital on Monday. Following an interrogation and deportation hearings, Turkish authorities decided to extradite the alleged ISIL supporter back home.
The woman will be deported from Ankara to London via Istanbul, NBC News said, citing police officials.
Meanwhile, the British counter-terrorism police unit arrested a female British citizen in London on Thursday on suspicion of plotting terror attacks, according to UK Metropolitan Police.
"21yo British woman arrested at Luton Airport this morning by SO15 Counter Terrorism Command having landed on a flight from Istanbul," UK Metropolitan Police wrote on Twitter Thursday.
21yo British woman arrested at Luton Airport this morning by SO15 Counter Terrorism Command having landed on a flight from Istanbul— Metropolitan Police (@metpoliceuk) March 19, 2015
Turkish and British police have intensified their cooperation after three British girls, aged 15-16, flew to Turkey on February 17 and reportedly crossed the border into Syria.
Turkey shares its longest common border with Syria, which is often used as a transit point by would-be ISIL fighters.