Officers from the Metropolitan Police have searched a house in South Shields, in relation to the attempted murder of an Indian general who had his neck slashed in London on Sunday.
Twelve people have been arrested, by the Counter Terrorism Command, in connection with the attack on Lieutenant General Kuldeep Singh Brar, on Old Quebec Street near Marble Arch.
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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.