CAIRO (AP) — Flames lit up downtown Cairo, where massive clashes raged Sunday, drawing Christians angry over a recent church attack, Muslims and Egyptian security forces. At least 24 people were killed and more than 200 injured in the worst sectarian violence since the uprising that ousted Hosni Mubarak in February.

The rioting lasted late into the night, bringing out a deployment of more than 1,000 security forces and armored vehicles to defend the state television building along the Nile, where the trouble began. The military clamped a curfew on the area until 7 a.m.

The clashes spread to nearby Tahrir Square, drawing thousands of people to the vast plaza that served as the epicenter of the protests that ousted Mubarak. On Sunday night, they battled each other with rocks and firebombs, some tearing up pavement for ammunition and others collecting stones in boxes.

At one point, an armored security van sped into the crowd, striking a half-dozen protesters and throwing some into the air. Protesters retaliated by setting fire to military vehicles, a bus and private cars, sending flames rising into the night sky.

After midnight, mobs roamed downtown streets, attacking cars they suspected had Christian passengers.