The Syrian Free Army has accused the Yemeni Shiite Houthi Group of sending its members to fight them in support of the Syrian regime.
The spokesman of the Syrian National Coalition, Wael Hafiz, said the Houthi Group was among other foreign groups which have sent their fighters to kill the Syrian people.
He urged through media the Houthi and Hezbollah fighters to leave Syria.
The call which was made after the bombing which killed Syrian defense and interior ministers as well as other top security and army officials amid the escalating popular uprising faced with deadly crackdown by the Assad regime.
"The Syrian Free Army will defeat the Shabiha of the Assad regime including large numbers of Shiites brought from Iraq, Lebanon and Yemen," he said.
The group has declined to comment.
The Yemeni army fought the Houthi Group in Saada province six times, the latest in 2009, on the grounds this group is receiving Iranian support and training within the regional Shiite ambitions.
When the popular uprising erupted in early 2011 against the former regime in Sanaa, it joined the mass protests and pitched tents inside change and freedom squares to demand a civil state rule.
It has since tried to emerge as a political force and has been trying to improve its image as a religious armed group.