Syrian Rebels: Three Iranian Hostages Killed by Syrian Government Shelling

Syrian rebel group has threatened to execute hostages that they claim are part of Iranian revolutionary guard.

A Syrian rebel group which has claimed responsibility for the kidnapping of 47 Iranians pilgrims in Damascus said Monday that three of the hostages were killed in a shelling by government troops on areas at the outskirts of the capital Damascus.

Al-Baraa Brigade of the Free Syrian Army announced on its Facebook page that "three of the Iranian prisoners were killed in fierce shelling on a Damascus suburb."

The group has threatened to "execute the prisoners who are proven members of the Revolutionary Guard if the shelling continues." Tehran, a main ally of the Syrian regime, has denied that any of the kidnapped pilgrims are members of the Revolutionary Guard.

The Iranian pilgrims were detained Saturday by the Syrian rebels.

Smoke billowing over Damascus.