Ian Haggath, 50, from the Dunston area of Gateshead, died on Wednesday.
The Foreign and Commonwealth Office said it was providing consular assistance and advised Britons to be aware of the possibility of attacks.
It said in a statement: "We are concerned about the possibility of violent attacks and take this matter very seriously."
"We have updated our travel advice to warn against the possibility of violent attacks and are in contact with the police and local authorities."
