At least seven people were injured, the authorities said. They said they believed it to be “an isolated incident,” but had not ruled out a connection to the attack in New Orleans.

The suspicious blast is being investigated as a possible terrorist attack, three senior law enforcement members briefed on the matter told NBC News.

The highly decorated Army soldier inside a Tesla Cybertruck packed with fireworks that exploded outside Trump International Hotel in Las Vegas shot himself in the head just before detonation, authorities said Thursday.