A 25-year-old man who was detained under the Terrorism Act 2000 after an operation in a Scottish town on Monday has been released without charge.
Mr Siddique was released without charge
Asif Siddique was held at the high security Govan police station in Glasgow following the operation in Alva, Clackmannanshire.
His brother Atif Siddique was charged under the Terrorism Act on Thursday, following his detention on 13 April.
Two other men also arrested on Monday were earlier released without charge.
Speaking on the steps of Govan police station after his release at about 1700 BST on Friday, Asif Siddique said: "From the start I have always said I was innocent. I don't know why I was detained. Now I just want to get home to my family."
His lawyer Aamer Anwar said: "My client is deeply traumatised and upset at what he has faced and angry at being labelled as a terrorism suspect."
Central Scotland Police declined to comment beyond confirming that there were now insufficient grounds to detain Asif Siddique.
On Thursday, Mr Siddique's brother, Atif Siddique, 20, was charged with offences under Section 58(1b) of the Terrorism Act at a specially convened court in Falkirk. The offences relate to the possession of documents or records containing information "likely to be useful" to a person committing or preparing an act of terrorism.
He remains in custody and is expected to appear at court again next week.
Asif Siddique's uncles Mohammed Niaz, 45, and Mohammed Rafiq, 40, were also arrested as part of the same investigation, but released without charge on Wednesday.