East Belfast MLA Michael Copeland told ITV News, "speaking as someone who for years looked under their car and actually still does, we're standing here on a very miserable afternoon that could have been a lot more miserable."
More top news
Rain will spread southeastwards through N. Ireland, Wales and England overnight. Northern parts of Britain will remain mostly dry.
Two members of the public were injured along with two police officers who were in the unmarked vehicle.
One of the attackers who murdered a priest in a French church during morning mass in Normandy has been named by prosecutors.