A security official said 4,000 people took part in another anti-Israel and pro-Gaza demonstration in the Mediterranean port city of Alexandria, the security official said.
Another 4,000 people rallied outside the Doctors' Syndicate in the capital against the Israeli onslaught that has also wounded more than 600 Palestinians in the isolated enclave on Egypt's northeastern border.
"Where is the Arab army?" some demonstrators shouted in Minya, calling for the Israeli embassy in Cairo to be shut down as other demonstrators burned the Israeli flag.
Many of the demonstrators across Egypt were members of the banned Muslim Brotherhood, the country's largest opposition group from which Hamas, the target of Israel's air strikes, evolved.