Five teenagers arrested in London on terrorism charges
The suspects, who ranged in age from 15 to 19, were held on suspicion of preparing acts of terrorism, London's Metropolitan Police said in a statement.
"The arrests relate to plans to travel to join a proscribed organisation," the note added.
A spokesman for the police would not confirm where the teenagers were planning on travelling to or which banned group they had intended to join.
The operation followed searches of four homes last month and a further raid in south London on Monday.