An Armored Corps drill near the Nafah base in northern Israel ended in disaster when an IDF soldier was killed.
The seizure from the Lana, formerly the Pegas, prompted Iranian forces in May to seize two Greek tankers in the Middle East Gulf.
Greek authorities last month impounded the Iranian-flagged Pegas, with 19 Russian crew members on board, near the coast of the southern island of Evia due to EU sanctions.
Over 1,200 soldiers were exposed to the secret information, while only about 450 had signed a confidentiality agreement.
Local authorities previously said 99 people had died when the tanker exploded following a collision in the eastern Freetown suburb of Wellington.
Four boats, each carrying six armed pirates, attempted to hijack the tanker, which was heading for the Bab-el Mandeb Strait. They turned back after an Iranian Navy escort squad fired warning shots.
Defense Ministry sources tell ‘Post’ that senior IAF officers have requested that the supply of aircraft fuel tankers be sped up.
Questions remain about how this ship was so easily hijacked and taken away. The case illustrates the lawlessness with which Iran operates in these areas.
On Monday, Tehran said it would ship more fuel to Lebanon, a day after the leader of Lebanon's Iran-aligned Hezbollah group said more vessels carrying Iranian fuel would sail soon.
While the IDF warns a response is needed to prevent future attacks, the political echelon is concerned an attack could damage political efforts against Iran.