Israeli troops on Sunday battled hundreds of pro-Palestinian protesters who tried to burst across Syria's frontier with the Golan Heights, killing a reported 20 people and wounding scores more in the second outbreak of deadly violence in the border area in less than a month.

The clashes, marking the anniversary of the Arab defeat in the 1967 Mideast war, drew Israeli accusations that Syria was orchestrating the violence to shift attention away from a bloody crackdown on opposition protests at home.

"The Syrian government is trying to create a provocation," said Israel's chief military spokesman, Brig. Gen. Yoav Mordechai. "This border has been quiet for decades, but only now with all the unrest in Syrian towns is there an attempt to draw attention to the border."

Human rights groups say President Bashar Assad's forces killed at least 25 people in northern Syria over the weekend, and another 65 activists were killed in the central city of Hama on Friday, as anti-government protests spread through the country demanding his resignation.

The protests began around 11 a.m. with what appeared to be several dozen youths, brought in on buses. It gained strength through the day.

As the standoff stretched into the evening, Israeli forces fired heavy barrages of tear gas to break up the crowds. Hundreds of people fled the area in panic, while some 20 people laying on the ground received treatment. It was not immediately clear whether the crowd would return to the front lines.

At nightfall, crowds of people fell to the ground in Muslim prayer, and several small groups lit bonfires, indicating the standoff would continue.