LONDON, Jan. 12 (Xinhua) -- A 27-year-old female British national has been arrested at Heathrow Airport after arriving on a flight from Ethiopia on suspicion of preparing terrorist acts, Scotland Yard said.

She was arrested on suspicion of preparation of terrorist acts under section 5 of the Terrorist Act 2006, according to the police.

Metropolitan Police said the suspect was detained under PACE and taken to a south London police station, where she currently remains in police custody.