A Cardiff postman has been suspended from his Royal Mail job following his arrest on suspicion of a terrorism offence, BBC Wales understands.
It is understood Sajid Idris has been suspended on full pay from his job at the Penarth Road sorting office.
He was arrested, along with four other men, by officers from the North East Counter Terrorism Unit and the Wales Extremism and Counter Terrorism Unit last December.
The Royal Mail declined to comment.
Officers executed six search warrants at addresses in the Grangetown area of Cardiff and Barry in December.
The arrests were for allegedly supporting proscribed organisations.
One of those arrested, Syed Choudary, 18, from Grangetown, was subsequently charged with supporting a proscribed organisation and assisting in the preparation of an act of terrorism.
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He was remanded in custody and is due to stand trial in June.
Mr Idris, and three other men, were granted police bail until a date in March.