A man arrested on suspicion of terrorism offenses after the Stockholm truck attack is from the central Asian republic of Uzbekistan and was known to intelligence services, Swedish authorities said...
Earlier, Sweden's public broadcaster SVT reported that a bag of undetonated explosives had been found inside the truck, which was stolen minutes before the attack as it made a delivery at a restaurant. The attacker apparently suffered burns caused by the explosives, which did not detonate properly, SVT said.
So it looks like there was some sort of bomb, as well. Double dipping.