A 33-year-old man arrested in Birmingham by anti-terror police has been freed without charge.
Police are continuing to question Sajid Badat from Gloucester
A Gloucester man is now the only one of three men held in separate anti-terror raids on Thursday to remain in custody.
Sajid Badat, 24, who was arrested in raids in his home town, is still being questioned at Paddington Green police station in west London.
A 39-year-old man arrested in Manchester in a separate raid on Thursday was freed on Friday night.
The release of the Birmingham man came after police confirmed searches of six addresses in the city.
They were at his home, two other homes and three business premises.
All three men had been held under section 41 of the Terrorism Act, "on suspicion of involvement in the commission, preparation or instigation of acts of terrorism."
Police have stressed they are not linking any of the three operations.
Meanwhile, Gloucester Police are continuing a "painstaking search" of Mr Badat's home in St James Street after being granted a 48-hour extension to question him.
They have until Monday morning to charge him, release him or apply for a further 36-hour extension.
Police said "nothing significant" was found at three other addresses in Gloucester during the raids, although it was earlier confirmed that a "relatively small amount" of explosives were found at Mr Badat's home.
Earlier on Saturday, before the Birmingham man had been released, officers were guarding a house in Green Lane, in the Small Heath area of the city.
Occupant Mohammed Ashraf said police had searched his house on Thursday and
asked him to stay with relatives.
He said police allowed him to return to the terraced house on Friday night.
"I have been staying with my daughter and came back here yesterday, I don't believe the police found anything and don't know why my house was searched," Mr Ashraf said.
"This is not the place where the man was arrested and we don't know anything
about the other raids."
Neighbours said police were seen looking under floorboards, removing drain covers and photographing the inside of the property.