A man from South Shields has been arrested in connection with alleged threats to shoot 200 schoolchildren in America.
It follows an anonymous post on a memorial page on Facebook on Wednesday 6th February.
Northumbria Police have confirmed a 24-year-old man has been arrested on Friday on suspicion of making threats to kill and is currently in custody.
A spokesperson for the force also said there is currently nothing to suggest he posed any physical threat to schools in the UK or in America.
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The constituency of Washington and Sunderland West includes the UK's largest car plant, which was opened by Nissan in 1984.
This seat was formed prior to the 2010 General Election, taking in Sunderland city centre and the Ryhope area to the south.
The constituency of Stockton South includes relatively affluent areas like Yarm and Eaglescliffe.