"The Israelis have conducted bolt-out-of-the blue attacks of this kind in the recent past in order to interrupt arms shipments from Sudan to the Palestinians in Gaza, via Egypt. The last such attack in Sudan occurred in 2009. As yet open sources have not reported the motive for the latest attack."
If indeed this fire was the result of an IAF attack. It could have been simple incompetence on the part of the Sudanese. There really isn't a good reason to haul weapons all the way from the Sudan when you have Libya next door awashed in loose weaponry. Still, one can understand the Israel "no comment". Let the Sudanese wonder about this.