(Adds Syria may not attend, clarification on League initiative)

By Aziz El-Kaissouni

CAIRO, May 10 (Reuters) - Arab foreign ministers will hold an emergency meeting on Sunday to discuss a crisis in Lebanon, the Arab League said on Saturday, after the Iranian- and Syrian-backed Hezbollah seized control of Beirut.

At least 27 people have been killed in four days of violence triggered by the pro-Western Lebanese government decision to target the military communications network of the anti-Israeli Shi'ite guerrilla group as being illegal.

"The Arab League council at the ministerial level will hold an emergency session on Sunday to discuss the Lebanese crisis and how to deal with it," the League said in a statement.

The meeting came after Saudi Arabia and Egypt -- both supporters of the pro-Western Lebanese government -- called for an emergency session to discuss the crisis, the worst in Lebanon since the 1975-90 civil war.

Syria's Arab League envoy Youssef Ahmed said that the Syrian foreign minister might not attend the meeting, Egypt's MENA news agency reported.

"Syrian Foreign Minister Walid al-Moualem might not head his country's delegation at tomorrow's emergency meeting of the Arab foreign minister's council ... due to work in Damascus," MENA quoted Ahmed as saying, adding he would head the Syrian team.

Syria, which was forced to withdraw its troops from Lebanon under international pressure after the 2005 assassination of former Lebanese Prime Minister Rafik al-Hariri, would not favour a meeting that is likely to condemn the actions of its main ally in Lebanon.

Hezbollah, its prestige enhanced in the region after it stood its ground against Israel's 2006 onslaught, called the government's decision to take legal action against Hezbollah's military communications a declaration of war.

The violence came following more than 17 months of deadlock over the election of a new president for Lebanon.

Earlier on Saturday, an Arab League official in Cairo said that the ministers would call for an immediate agreement on the forming of a Lebanese national unity government and the election of army chief General Michel Suleiman as president.

They would also call for a team of "politicians, intellectuals and neutral parties" to work on drafting a new electoral law after the election of Suleiman, the official who declined to be identified added.

Hesham Youssef, Secretary-General Amr Moussa's chief of staff, said that a new president had to be elected before a cabinet could be formed.

"The first clause of the (Arab) initiative is about the election of the president, the second clause is about forming a government, the third clause is about the electoral law," Youssef said.

The presidency has been empty since November in the absence of a resolution to the political deadlock. (Writing by Aziz El-Kaissouni; editing by Sami Aboudi)

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