"Two rockets fired from Sinai struck southern Israel, but without causing casualties or material damage," the spokesman said, without elaborating.
Egypt is reeling from a string of deadly attacks by the Islamic State group on the security forces in the Sinai.
Jihadists led by IS have killed scores of troops, challenging President Abdel Fattah al-Sisi's efforts to restore security and economic stability in the biggest Sunni Arab country.
On Wednesday, Egypt's military deployed F-16 warplanes to bombard IS fighters who battled troops in a North Sinai town after launching a surprise dawn attack on army checkpoints.
Incidents along the Israel-Egypt border are rare.
At the end of last year two Israeli soldiers were wounded by gunshots and an anti-tank missile fired at their car from the Sinai.
The most serious incident was in August 2011, when gunmen infiltrated southern Israel and staged a series of ambushes that killed eight Israelis.
Israel has a 240-kilometre (150 mile) border with the Sinai, which is mainly populated by Bedouins who maintain difficult relations with the central government.
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