A 75-year-old man arrested in connection with a home-made bomb which exploded near a mosque has been released on police bail.
The man was arrested on Thursday by detectives from the West Midlands Police Counter Terrorism Unit.
It comes after the remains of a home-made explosive were found in an alleyway adjoining the Aisha Mosque and Islamic Centre in Rutter Street, in the Caldmore area of Walsall, last Saturday.
The man was arrested at his home in Walsall at around 4.30pm on Thursday but has now been released on bail, pending further inquiries, West Midlands Police said.
Detectives and experts from the force's counter terrorism unit are continuing to work to find those responsible for the device, the force said.
They have appealed for anyone who saw a white man of average build, walking on his own, carrying a small bag, along Corporation Street from the direction of Wednesbury Road between 10 and 10.30pm last Friday.
Around 150 people were evacuated from their homes in the Caldmore area of Walsall last Saturday night while bomb disposal experts made the remains of the device safe.
West Midlands Police said a loud bang heard by residents late on Friday "appeared to be consistent" with the device exploding but no-one was injured and it caused minimal damage.
Officers were contacted on Saturday when the remains of the device were found in an alleyway.
Anyone with information on the incident is asked to contact West Midlands Police on 101.