Six rocket-propelled grenades (RPGs) were fired by unknown assailants at a mosque in North Sinai's Al-Arish.
According to Al-Ahram Arabic news website, the mosque is affiliated with a Sufi order in Al-Tawil district. No casualties have been reported.
North Sinai, on the border with Israel, has suffered a security vacuum for years, particularly since the ouster of Islamist president Mohamed Morsi last summer.
Suspected Islamist militants based in the peninsula have waged a high-level insurgency against security forces, to which the army has responded with counter-insurgency operations.
In 2011, a series of attacks against Sufi shrines took place across Egypt. Most of the attacks were instigated by Salafists who believe the shrines are an abomination against Islam.