Syria on Saturday sent two letters to the United Nations on the "massacre" perpetrated by Israel Friday in the Lebanese northern Bekaa town of al-Qaa against Syrian and Lebanese workers.

According to the official SANA news agency, Syrian Foreign Ministry sent the letters, identical in contents, respectively to UN Secretary General Kofi Annan and the rotating chairman of the UN Security Council.

The letters denounced that Israeli warplanes "intentionally" killed 33 Syrian and Lebanese civilians and wounded 14 others, who were having lunch after a day long work in loading food stuff to the Lebanese.

"Among those victims were 26 Syrian civilians," the letters added.

The letters attributed the cause of "mass killings" in Lebanese villages, such as Qana and Qaa, to "preventing the UN Security Council from shouldering responsibility, failure to punish the killers of the UN soldiers in south Lebanon.

The letters also described the act of blocking the UN Security Council from stopping Israel's state terrorism and war crimes as "systematic destruction" of the UN Charter and international laws.

"Syria supports the call that a fact-finding mission on Qana massacre carry out its duties immediately and expand its mandate to investigate into the Qaa massacre," the letters added, demanding full compensation for the Syrian victims.

The letters called for an immediate and unconditional ceasefire and the Israeli withdrawal beyond the blue line in south Lebanon. Earlier on Saturday, the 26 killed Syrian civilians, including six woman, were buried on the orders of Syrian President Bashar al-Assad, who called those killed "martyrs".

On Friday, the Israeli warplanes pounded the village of al-Qaa, which is close to Lebanon's border with Syria, killing at least 30 farm workers and wounding over a dozen others. Most of the dead were Syrian Kurds from poor villages in northern part of the country.

It was one of the highest death toll in a single strike since the start of Israeli aggression on Lebanon on July 12. The deadliest Israeli strike was that in another Lebanese village of Qana last week, which the Lebanese government said killed up to 54 civilians.