Title: Source: Bomb Explosion Hypothesis Excluded After 2 Killed in Car Blast at U.S.-Canada Border

An informed source regarding the initial investigations stated that a driver and passenger were killed in a car explosion at the Rainbow Bridge, which connects Canada to the United States, but the hypothesis of a bomb explosion has been ruled out as the cause of the blast. The source, who requested anonymity, mentioned that terrorism has not been ruled out yet as the circumstances surrounding the incident are still unclear. The source added, "Terrorism has not been ruled out because we really have no idea what happened."