Egyptian riot police have clashed with anti-government protesters on the streets of Cairo.
A witness reported that they fired live rounds into the air to disperse several hundred protesters, as well as tear gas and bird shot.
Footage also showed security forces arresting several men, reported to be supporters of the ousted president Mohamed Morsi.
More top news
163,000 French and 143,000 German soldiers were killed in the 10-month battle in 1916.
As many as 700 migrants have been died after three consecutive days of shipwrecks off the coast of Libya, the UN Refugee Agency has said.