RCMP in Oliver and with the Penticton South Okanagan Similkameen section say Stephan Daoust, 19, and Eric Daoust, 23, were arrested Thursday night and have been charged with using explosives.
RCMP say the bomb in question detonated in the middle of the night on Aug. 11, but no one reported it to police right away.
Some neighbours later told police that they had heard some kind of blast at around 2 a.m PT. Other neighbours saw the bombed vehicle, which was parked in the alleyway between Okanagan Street and Earle Crescent, but assumed the damage was the result of a lightning strike.
The investigation only got underway on Aug. 12 when a woman went to the local police detachment with a piece of metal shrapnel that had penetrated the wall of her garage.
The RCMP's bomb disposal unit went to the neighbourhood, found the damaged car, and determined that an improvised explosive device had been detonated under the car.
One of the two Daoust brothers was also charged in connection with an incident that happened in September at the home associated with the bombed car, in which it is alleged he entered and discharged a can of bear spray.
South East District RCMP spokesman Cpl. Dan Moskaluk said the incidents appear to stem from an ongoing grudge between the brothers and a third Oliver resident.
"Our findings into both associated matters indicate that the violence was targeted towards the young man who resided in the home where the car was damaged," Moskaluk said. "All three knew each other and are Oliver residents. It appears that the matter stemmed from a mutual longstanding dislike for each other."