Counter-terrorism police investigating the so-called "Punish a Muslim Day" letters have arrested a man on suspicion of conspiracy to murder.
The 35-year-old from Lincoln is in custody in West Yorkshire following his arrest on Tuesday.
Lincolnshire Police said the man had been arrested on suspicion of sending a hoax noxious substance, sending threatening letters and conspiracy to commit murder.
Searches have taken place at a residential property in south Lincoln and an office building in the city centre.
It follows a number of reports of hate mail being received in March. [Daily Mirror] Read more
