Relations between Riyadh and Damascus have been tense since President Bashar al-Assad's bloody crackdown on dissent began in March last year.
In August, Riyadh withdrew its ambassador to Damascus and expelled the Syrian ambassador from Saudi Arabia in protest at the bloodshed.
The Syrian regime accuses Saudi Arabia, along with Turkey and Qatar, of arming the rebels fighting Assad's forces.
It was not known if the three consulate employees expelled had diplomatic status.
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In August, Riyadh withdrew its ambassador to Damascus and expelled the Syrian ambassador from Saudi Arabia in protest at the bloodshed.
The Syrian regime accuses Saudi Arabia, along with Turkey and Qatar, of arming the rebels fighting Assad's forces.
It was not known if the three consulate employees expelled had diplomatic status.
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