The Israel Defense Force has said a tweet warning of a 'nuclear leak' following a rocket attack was false - claiming their Twitter account had been hacked.
The official IDF Twitter account posted the following message on Thursday night: '#WARNING Possible nuclear leak in the region after 2 rockets hit Dimona nuclear facility'
As expected, the post went viral on Twitter.
But it was soon deleted from the account.
The IDF then posted a tweet, claiming there had been a security breach and apologised.
Today, the Israeli military rushed additional forces to its southern border with the Gaza Strip, vowing to halt a growing wave of rocket fire from the Palestinian territory.
The move came as new clashes erupted in east Jerusalem in response to the death of an Arab boy who Palestinians say was killed by Israeli extremists.
Israel said the show of force on the Gaza border was a defence measure. But persistent rocket fire raised the prospects of a tough Israeli response, with the military saying more than 40 rockets or mortar shells were fired from Hamas-controlled Gaza today.
Tensions have been high since three Israeli teenagers were abducted in the West Bank on June 12, sparking a massive manhunt that ended with the discovery of their bodies early this week.