Police are trying to trace a terror suspect in breach of a special order restricting his movements.
Mohammed Ahmed Mohamed slipped under the radar of counter-terrorism officers after he disguised himself in a burka when leaving a mosque in West London on Friday afternoon.
He's not been seen since.
Somalia-born Mohamed, who is 5ft 8in tall and of medium build, arrived at the An-Noor Masjid and Community Centre in Church Road, Acton, at 10am on Friday.
He was last seen there at 3.15pm that day.
The 27-year-old is not considered a "direct" threat to the public but the police are urging the public not to approach him but dial 999.
More top news
Police said they are "extremely concerned" for the welfare of a "vulnerable" mother and her two children who have gone missing in Bexley.
It is hoped the 7,400-mile journey will become a cost-efficient and time-saving way of transporting trade between China and the UK.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.