Warning sirens sounded early Friday morning in the Jordan Valley, accompanied by reports of two loud explosions heard as far as Jerusalem, dozens of kilometers to the west.
The sirens, which are triggered automatically when rockets are detected by IDF sensors to be headed toward population centers, went off near the communities of Gitit, Mesoa, Yitav and Yafit in the Arvot Hayarden regional council, which straddles the Jordan River in the West Bank.
There were no reports of injuries or damage.
IDF forces launched searches of the mountainous terrain for signs of fallen rockets.
There was no immediate word early Friday if rockets had indeed caused the sirens and detonation sounds, how many there were, or where they were launched.
The sirens sounded at 2:43 a.m. The explosions followed moments later.