A group of looters attacked a warehouse at the Qantara Museum near the city of Ismailia on the Suez Canal that contained 3,000 objects from the Roman and Byzantine periods, a source at the tourism police said.
Many of the objects had been found in Sinai by the Israelis after they occupied the peninsula during the 1967 war with Egypt, and had only been recently returned to Egypt.
A worker at the warehouse said the looters had said they were searching for gold. The worker told them there was no gold but they continued to pillage the storehouse, smashing some items and taking others.
An archaeologist said warehouses near the pyramids of Saqqara and Abu Sir were also looted.
On Friday, looters broke into the Cairo museum, home to the world’s greatest collection of Pharaonic treasures, smashing several statues and damaging two mummies, while police battled anti-government protesters on the streets.