Syrian forces relaxed their pressure on Palestinian camps here today after the Palestine Liberation Organization pleaded with Arab leaders to prevent bloodshed.

The Syrians pulled back an armored brigade that had been surrounding the camps in the southern section of Beirut near the airport. This Syrian force had sealed off the camps, restricting movements in and out.

The troops were pulled back after PLO leader Yasser Arafat called Syrian President Hafez Assad, according to Syrian state radio, and told him: "We know that you have put up with many excesses from Palestinians and other participants in the Lebanese war. We also hope your patience will not run out now."

According to the pro-Syrian newspaper Al Sharq, the Palestinian leaders agreed to hand over eight radical guerrillas accused of killing a Syrian leiutenant at a roadblock Friday.

In return for handing over the fighters, the newspaper said, the Syrians dropped plans to invade the Palestinian camps in a search for heavy weapons.

News agencies reported these Middle East developments:

Syrian troops completed their withdrawal from southern Lebanon's sensitive Nabatiyah area near the Israeli border.

The U.N. Human Rights Commission voted 23 to 3 in Geneva to condemn Israel for the seventh straight year over alleged atrocities in Arab lands it has occupied since the 1967 war.