Three people, including a child, were killed in a drone attack on a vehicle near the Syrian-Iraqi border late on Thursday, according to a war monitor. The Syrian Observatory for Human Rights, which has been documenting violence in Syria since 2011, said two members of pro-Iranian militias and a child were killed when a truck was hit by a drone near a military headquarters of pro-Iranian militias at the outkirts of al-Bou Kamal in eastern Syria. It was not immediately clear who was responsible for the attack. The area where the truck was hit is controlled by pro-Iranian militias. Rami Abdel Rah…