Egyptian security forces clashed Monday with protesters demonstrating outside the Israeli embassy in Cairo over the anniversary of the founding of the Jewish state, DPA reported.
At least 40 were injured and several arrested when the armed forces responded with rubber bullets and tear gas as a group of protesters tried to gain access to the building, Al Jazeera reported.
Thousands of demonstrators gathered late Sunday for Nakba Day, or Catastrophe Day, which marks the founding of Israel in 1948, after which hundreds of thousands of Palestinians were displaced.
The protest began peacefully outside the embassy but clashes broke out when a group tried to enter the building, the report said.
On Sunday, more than 20 people were killed as demonstrators attacked the heavily fortified Israeli border from Syria and Lebanon.
"Their blood was spilled for the freedom of our Palestinian people and for its rights," Palestinian President Mahmoud Abbas said of the victims in a televised address Sunday.
Israeli Prime Minister Benjamin Netanjahu said his country was "determined to defend our borders and our sovereignty" and called for a return to calm.