A man has been arrested by anti-terror officers investigating a bomb threat received by a mosque.

A letter reading, “Next time it will be a bomb you Muslim scum” was sent to the Jamia Masjid Abu Bakr mosque in Eastwood, Rotherham, on 1 August.

It was signed with a number code believed to be used by neo-Nazi groups.

A 43-year-old man from Plymouth was arrested on Friday morning under the Malicious Communications Act, the North East Counter Terrorism Unit said .

He has been detained for questioning and inquiries are continuing.

The letter sent to the mosque is believed to be one of a number sent to locations around England.

These include religious establishments, police stations and residential addresses in South Yorkshire, West Yorkshire, Bedfordshire and Avon and Somerset.