Eight Syrian fighters working with Iran’s Revolutionary Guards were killed on Tuesday in a knife attack on their position in eastern Syria’s Deir Ezzor province, a war monitor said. The Syrian Observatory for Human Rights said “unidentified armed individuals” raided the position in the Syrian desert, in the second deadly attack on pro-Iran fighters in two days in the Mayadeen area. The eight dead fighters “worked under the command” of Iran’s Guards and were “slaughtered” using knives, said Rami Abdel Rahman, head of the Britain-based Observatory, which relies on a network of sources in Syria. …