About 1 million Palestinians were confined to their homes in the occupied lands Tuesday as hundreds of extra police patrolled Jerusalem on the anniversary of the first armed PLO attack in Israel.

But some Palestinians still managed shows of defiance on "Fatah Day," marking the 1965 attack on Israel's water system by the mainstream Palestine Liberation Organization faction founded by PLO Chairman Yasser Arafat.In the West Bank village of Burka, about 300 Palestinians placed blazing torches forming the letters PLO on a hilltop. In Bethlehem, masked activists went door to door, handing out candy and posters of Arafat.

PLO supporters encouraged Palestinians to stage marches and throw firebombs on the anniversary. A leaflet by uprising leaders urged activists to violate curfews, which affected nearly all the 750,000 Arabs in the occupied Gaza Strip and about 250,000 others in the West Bank.

More than 2,000 police patrolled Jerusalem Tuesday, Israel radio said. At roadblocks ringing Jerusalem, many Palestinians trying to enter the city were turned away.

"We deal with the whole period around Jan. 1 as a time of high alert," said Police Commissioner Yaacov Terner.

On Monday, a bomb exploded in a public toilet in Jewish west Jerusalem's outdoor market, killing an Arab woman who apparently was carrying the device. Police linked the explosion to "Fatah Day."

In some West Bank towns and villages, Palestinians marched late Monday to mark the anniversary.

About 800 people, including some carrying sticks and chains, walked through the village of Yamoun. In the town of Jenin, 150 masked men in self-styled military uniforms waved posters of Arafat.