BEIRUT -- UN Special Envoy Terje Roed-Larsen arrived here Monday to discuss the situation on the Lebanese-Israeli border and in the Middle East, AFP quoted the UN Information Center as saying.

Roed-Larsen is due to meet with President Emile Lahoud, Prime Minister Rafiq Hariri and Parliament Speaker Nabih Berri during his 24-hour visit to Lebanon, it said.

On Tuesday, Roed-Larsen is expected to travel on to neighboring Syria, the main power broker in Lebanon, the Center added.

Roed-Larsen was the main architect of the Blue Line, the UN-drawn demarcation line after Israel ended 22 years of occupation in southern Lebanon in May 2000.

Clashes have recently escalated between Lebanese Hezbollah guerrillas and Israeli forces occupying a disputed border area following the March 29 launch of the Israeli military offensive into the West Bank.

The Shiaa resistance group Hezbollah has vowed to continue its guerrilla warfare to "liberate" the Shebaa farms, seized by Israel from Syria in 1967 and now claimed by Lebanon.

On Sunday, UN Secretary General Kofi Annan said he was "disturbed" by Israeli attacks on Roed-Larsen over his outspoken criticism of the conduct of Israeli forces in the devastated Palestinian refugee camp of Jenin.

Israel has suggested that he might be declared persona non grata.