Nicky Reilly was injured in the explosion
A man arrested after a bomb explosion at an Exeter restaurant is being questioned by police after leaving hospital.
Nicky Reilly, 22, from Plymouth, was injured when an explosive device detonated at the Giraffe restaurant last Thursday.
He has finished treatment and is in custody in the Devon and Cornwall area.
A Muslim leader told Devon County Council on Tuesday that the explosion was "designed to create division".
Another man arrested on Friday in connection with the blast is still being questioned.
The man was apprehended by armed officers at the Bagatelle cafe in Plymouth on Friday.
Both he and Reilly can be held for 28 days under anti-terrorism legislation. Another man detained at the Bagatelle cafe is "continuing to assist" police with their enquiries.
Officers are continuing to search a number of premises as part of the investigation.
On Sunday a terraced house in Old Laira Road, Plymouth, was searched by officers investigating the attack.
An address in Connaught Avenue, Mutley, was searched on Tuesday afternoon.
Police said Reilly had boarded a number X38 double-decker Stagecoach bus to travel from Plymouth to Exeter on Thursday morning.
After sustaining injuries in the restaurant blast he was admitted to the Royal Devon and Exeter hospital under police guard.
Officers later revealed he had a history of mental illness.
Deputy Chief Constable Tony Melville said police believed he had adopted the Islamic faith and had been "preyed upon" and "radicalised".
A dedicated team of detectives from Devon and Cornwall Police continue to work on the investigation, assisted by officers from Scotland Yard's counter-terrorism branch.
The Imam of Exeter Mosque, Mohammed Abrar, told Devon county councillors that he "utterly condemns" the "act of terrorism".
He said: "Such an act of terrorism is designed to create division, is indiscriminate in who it affects, and is a crime.
"It is important that this shocking experience pulls us all closer together and does not serve to spread fear and mistrust among communities.
"Devon has a proud history of different communities working together and we must not allow this incident, or anything else, to stop that from continuing."