Egypt's Morsi's supporters clash with opponents

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Supporters of Egypt's ousted President Mohammed Morsi hold poster with photos of him as they march on a street in Cairo, Egypt, Monday, July 22, 2013. The family of ousted Egyptian President Mohammed Morsi accused the country's military generals Monday of "kidnapping" him, and said that it holds the army responsible for his "safety and security." (AP Photo/Hiro Komae)

CAIRO (AP) — An Egyptian security official says supporters of Egypt's ousted president Mohammed Morsi are clashing with opponents holding a sit-in in Cairo's Tahrir square.

The Monday violence took place when several hundred pro-Morsi protesters were marching toward the U.S. Embassy to hold a demonstration against alleged American meddling in Egypt's affairs, the official said.

The march passed an entrance to Tahrir Square manned by anti-Morsi protesters, and the two sides pelted each other with rocks. Gunfire was heard, but it was not clear who was firing.

Armored vehicles moved and blocked the road, the official said, speaking on condition of anonymity because he was not authorized to speak to the press.

The Muslim Brotherhood has staged daily protests across the country since Morsi was deposed on July 3, demanding his reinstatement.