Three people were killed when Israeli security forces opened fire across the Syrian frontier to disperse hundreds of pro-Palestinian protesters who stormed the border on the anniversary of the Arab defeat in the 1967 Mideast war.
Israel had promised to prevent a repeat of a deadly protest last month, in which hundreds of people burst across the frontier and stormed into the Israeli-controlled Golan Heights.
"Unfortunately, extremist forces around us are trying today to breach our borders and threaten our communities and our citizens. We will not let them do that," Prime Minister Benjamin Netanyahu told his Cabinet.
"I have instructed our security forces to act with resolve, with maximum restraint but with resolve in order to safeguard our sovereignty, our borders, our communities and our citizens."
Despite the warnings, several hundred demonstrators passed by a Syrian police outpost and marched to the barbed-wire lined trench the Israeli military dug along the border after last month's unrest.
Israeli troops opened fire, sending demonstrators running in panic. Several wounded people were taken away by demonstrators.
State-run Syrian TV reported three dead and nine wounded.