Not in the normal way. Normal explosives would just make a mess.
The explosives on a nuc are designed for a certain shape of blast to compress the uranium or plutonium core and have to be timed to perfection.
Unless of course they want to go for the simple little boy type bomb where you fire a plug of uranium into a larger one but even that doesn't guarantee a fissionable explosion.
Atom bombs are great. In theory the simplest bomb to make, in practice something entirely different.
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