They wouldn't have mentioned checking for arms unless they found some.
More likely they were looking for spare parts falling off the poor thing just to be certain it wasn't dangerously leaking rads into the water.
However, if it was a Diesel Electric boat, we don't operate any of those.
But France, Germany, Greece, and a handful of others do.
But I'd lay odds on it being a French boat.
If it had been a diesel boat, I don't think Israeli naval officers would have hinted at the possibility it was a US sub...