Michael McDonald said: “This was an outrageous attack on a group from a political party who are preparing for a democratic election. We must not let those opposed to the peace process deter anybody from standing or taking part in elections.
“This was attempted murder. I am just thankful that nobody was hurt in this incident.
“This must have been a traumatic experience for these people, I hope that they are able to quickly get over their ordeal.
“If anybody has any information about this attack then I would urge them to contact the police.”