CAIRO - Egyptian security forces opened fire at supporters of ousted President Mohamed Morsi demonstrating outside a military facility here early Monday, the country's Muslim Brotherhood said.

The organization said in a statement posted on its website that 16 were killed and more than 100 others injured in the latest episode of violence in the unrest-torn country.

The Qatar-based Al-Jazeera TV quoted a hospital source as saying that at least 34 people were killed.

The army said on state TV that one officer was killed and 40 wounded in the "attack" on the military facility.