Activists say opposition fighters have shot down a military helicopter in the east of Syria, killing eight troops of Al-Assad regime on board. The Britain-based Syrian Observatory for Human Rights on Monday posted a video online showing several armed men standing in front of the wreckage. One of the fighters in the footage says it's a helicopter that they shot down late Sunday in the eastern province of Deir el-Zour, along Syria's border with Iraq. As the man speaks, the camera shifts to a pickup truck piled with bodies. The fighter is then heard saying that all of President Bashar Assad's troops who were aboard the helicopter were killed in the downing, according to a report of the Associated Press. The Observatory, which relies on a network of activists on the ground, says eight troops were killed.