Stewart Dickson MLA said: “There is absolutely no justification for threatening the life of any person.
“It is unacceptable that Martin and a number of other politicians have had to deal with threats or attacks in recent months. Elected representatives should be able to work on behalf of their constituents without such threats.
“I would like to offer my support and solidarity to Martin and any other politician who has faced such a threat.
“I would urge anybody with any information about this death threat to contact the police.”