I'm not going to assume they are drugs, I'm not that weird. I'm confident our military could figure it out and share the evidence, though. They should be competent enough.
Well we'll never know will we? because they blew it up.
I get it. If you are travelling in a high speed boat with 55 gallon drums then you get executed, for the crime of travelling in a high speed boat with 55 gallon drums.
Fuel oil deliveries to smaller communities that don't buy in tanker quantities. Those boats are basically the u-hauls of the sea.
They could be smuggling other things, we got tariffs all over the place.
Gold? Gems? Cartel victims? Or... a 'boatload of cash'?!