They said no further action will be taken against the two 18-year-olds and one 19-year-old, who were released today.
The three had been arrested May 1 on suspicion of the commission, preparation and instigation of terrorist acts.
A 21-year-old woman who was shot by counter-terrorism officers on April 27 during a planned operation remains in custody, along with two other women. Police said they had disrupted an active terror plot when they raided a property in northwest London. The later arrests were part of the same investigation
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