Cairo - The Islamic State jihadist group's affiliate in Egypt claimed responsibility for a rocket attack from the Sinai Peninsula into southern Israel on Friday.
"Three Grad rockets were fired at Jewish positions in occupied Palestine," the "Sinai Province" group said in a statement on Twitter.
An Israeli military spokesperson said earlier that two rockets fired from Sinai exploded inside Israeli territory without causing casualties.
The ISIS-linked group said the rocket fire was in retaliation for alleged Israeli support for Egypt's armed forces on Wednesday when the jihadists attacked army checkpoints in northern Sinai.
Egypt's military deployed F-16 warplanes to bombard IS jihadists who battled troops after launching their surprise dawn attack.
Dozens were killed in what was ISIS's boldest attack yet in the strife-torn Sinai.