Saad Al-Hariri, leader of the largest coalition in Parliament, and son of murdered Rafiq Al-Hariri, has hinted that President Emile lahoud was behind the murder of his father.

Het met a US delegation of Senators for the specific purpose of putting pressure on Lahoud to co-operate with the investigation. "I am not accusing anyone of killing my father but waiting for the outcome of the investigations," he said.

It comes just days after UN investigators blamed the head of Lahoud's Presidential guard. But Hariri protested that he hasn't made up his mind: "I think, like I said before, pointing a finger on somebody could be damaging. And, like you have in courts in the United States, you're innocent until proven guilty."

He also said that the border blocakade send the wrong message to the Lebanese (did the murder of Syrian citizens send the wrong message to the Syrians?).

Syria claims that they needed to tighten border security after pulling troops out of Lebanon. In recent weeks there have been a number of clashes between rebels and security forces - one at the border, one in Damascus and one in Homs.