UPDATE 1-Syrian PM defects to Jordan-official source

* Most high profile defection from Assad's government

* Assad appoints caretaker prime minister

AMMAN, Aug 6 (Reuters) - Syrian Prime Minister Riyad Hijab

has defected to Jordan, a Jordanian official source said on

Monday, prompting Syria to announce he had been sacked and

replaced by a caretaker premier.

"Hijab is in Jordan with his family," said the source, who

did not want to be further identified.

Hijab's defection was one of the most high profile

desertions from President Bashar al-Assad's political and

military circles. On Sunday, al Arabiya television reported a

senior Syrian intelligence officer had also defected to Jordan.

Hijab, a Sunni Muslim from Syria's Sunni province of Deir

al-Zor, was also a ruling Baath Party apparatchik.

State television said Omar Ghalawanji, who was a deputy

prime minister as well as minister for local administration,

would lead a temporary caretaker government.

Assad had appointed Hijab, a former agriculture minister, as

prime minister in June following a parliamentary election which

came after more than a year of violent protests against Assad's

rule.