Counter terrorism officers have arrested a man over a bomb threat at a Rotherham mosque.
The 43-year-old was arrested in Plymouth over a letter sent to the Jamia Mosque in Russell Street, Eastwood, on Monday, August 1.
The letter made reference to a bomb.
A North East Counter Terrorism Unit spokesman said: "At approximately 8am, a 43-year-old man from Plymouth was arrested under the Malicious Communications Act by officers from the North East Counter Terrorism Unit.
"He has been detained for questioning.
"Enquiries are ongoing."