Baltimore Key Bridge Taken Out by Ship

There's an enormous amount of kinetic energy released when a ship as tall as a skyscraper and massing hundreds of thousands of tons hits anything, and that could be interpreted as looking like an explosion.

But if you are asking if there were actual explosives involved, I have not heard anything about that at this time, and the subject matter experts I know (one of whom was a Navy helmsman, the other who works in the intelligence community) agree that this looks like an accident and not terrorism.