The official told the London-based Al-Hayat newspaper that Egyptian authorities have observed the entry of 150 Izz al-Din al-Qassam operatives into Sinai via the tunnels. "They were wearing uniforms associated with the military police before joining Jihadists in Sinai," he said.
The official added that the army suspects that Palestinians took part in assaults on army posts last Friday.
In addition, Egyptian security sources told the Al-Masry Al-Youm newspaper that Muslim Brotherhood officials are overseeing terrorist activity against army and police forces in Sinai and coordinating these efforts with commanders in Hamas' military wing.
At least 42 people were killed on Monday when Islamist demonstrators enraged by the military overthrow of Morsi said the army opened fire during morning prayers at the Cairo barracks where he is being held.
But the military said "a terrorist group" tried to storm the Republican Guard compound and one army officer had been killed and 40 wounded. Soldiers returned fire when they were attacked by armed assailants, a military source said.
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