A man from Greater Manchester has been arrested over the alleged posting a number of dangerous packages to a Glasgow journalist.
The 45-year-old from Tyldesley, Greater Manchester, allegedly posted suspicious packages containing bottles of caustic soda to the journalist on 25 April.
A similar parcel is understood to have been sent to a Blackburn councillor on the same day. The suspect was detained by police in the Blackburn area, and is due to be questioned by anti-terror detectives.
A Greater Manchester police spokesman said: "A 45-year-old man from Tyldesley, Greater Manchester, was arrested in the Blackburn area on suspicion of terrorism-related offences by officers from Lancashire Constabulary on behalf of Greater Manchester Police."
"He has been taken to Greater Manchester, where he is being questioned."
A 42-year-old man appeared in court last week in connection with the same incident.