Scotland Yard said two buildings also were being searched.
CNN  — 

A 21-year-old woman who had just arrived at Heathrow Airport in London on a flight from Turkey was arrested Thursday on suspicion of preparation of acts of terrorism, London Metropolitan Police said.

The traveler is from north London and the arrest is Syria-related, police said.

Police also searched two addresses in north London on Thursday.

CNN called Scotland Yard for comment but police declined to give further details.

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CNN’s Peter Dailey contributed to this report.