"Nine young men from a paramilitary Academy are in critical condition, one was missing after their Thursday swept away by water while Hiking in Nahal Tzafit, the riverbed in the southern part of the Dead sea", - stated in the message.
An investigation into the tragedy has been opened by Israel Police to determine how and why the school took the students on such a field trip in an area about which there had been numerous and repeated public flash flood warnings for at least two days prior.
According to the Israel National News website, an email sent by a staff member to a concerned student before the hike said: "Do not worry".
Funeral for the students who lost their lives was held on Friday. "I ask you all, please follow the instructions of the police and rescue forces and be attentive to them".
Nine of the teenagers' bodies were recovered, officials said, after torrential rains swept over an area that is usually arid and dry.
Several Israeli teenagers have died after their group was hit by flash floods during a hiking trip near the Dead Sea.
"At one point there was a wave that was three or four meters high", he told his father, the Times of Israel reported, citing Hadashot news.
A Palestinian teenage girl drowned in the West Bank town of Bethlehem, medics said. The excursion was intended as a pre-program bonding experience.
On Wednesday, the floods also claimed the lives of two children from Israel's Bedouin community.
"I can't believe that I am actually going out in this weather, it's not logical that we should go to such a place where there will be floods, it's tempting fate, we will die, I am serious", a student wrote, according to local reports.
"It doesn't make sense for us to go to a place where everything is flooding".