VIDEO: Israeli forces kill at least 58 people and injure 2,700 in Gaza 'massacre'
Israeli forces have killed at least 18 Palestinians during mass protests along the Gaza border, casting a cloud over the inauguration of the new US embassy in Jerusalem.
It is the deadliest single day of protests since the Palestinians began staging weekly border demonstrations on March 30 in an attempt to break an Israeli-Egyptian blockade.
Protesters set tyres on fire, sending thick plumes of black smoke into the air, while the Israeli military accused protesters of trying to break through the border fence and plant a bomb. They also claimed troops had come under fire.