If an improvised explosive device was found in the car, it must have been an act of terror. Thankfully, it didn’t detonate—things could have been far worse.
It's a tragic day. I hope they uncover what drove someone to commit such a terrible act.
No doubt the authorities are already breaking down everything known about this perpetrator and his history, possibly even hoping to find some sort of social media posts or manifesto describing his issues & motive.