Police said they received information of the blast outside a pub at about 4.30am. Four cars were damaged in the explosion.
It is learnt that the explosion came from underneath a car that was parked in the area. Another unexploded device, also believed to be a grenade, was found underneath another car, a Toyota Camry.
It is learnt that two explosive objects were thrown at the scene from the second floor of a building.
The cars that were damaged by the explosion included a Toyota Vellfire, Camry, Mazda and a BMW 5 series.