Aviation Week reports on a bombing raid outside of Khartoum, Sudan back on 24 October of this year. Satellite photos in the article show before and after. Before shows a bunch of containers (the ship carried sort) neatly stacked in a yard. After shows a huge crater in the same yard, no sign of any containers. Locals reported jet aircraft noises just before the place blew up around midnight. Explosions and fires raged for hours. The containers are believed to have held some 200 tons of munitions bound for Gaza or the Sinai peninsula.
No comment from Israel.
Rough neighborhood. Back in 2007 the al- Kibar Syrian nuclear reactor was bombed flat. In 2009 and Iranian truck convoy in Sudan met with a high explosive mishap while crossing the desert. Stuxnet went to work back in 2007 and wasn't detected until 2010. In 2011 a Hamas arms smuggler in Port Sudan was killed from the air. In 2012 electric power lines to Iran's nuclear facilities were bombed.
No one has claimed credit for any of this. No comments from Israel either.
When your existance is threatened, take steps.