A US attack on a convoy that is believed to have been carrying Iraqi leaders may have taken place inside neighbouring Syria, a Pentagon official has admitted. At least five Syrian border guards were injured in the attack, which was carried out by US Special Forces backed by aircraft, US officials said. US military spokesman Lieutenant Colonel Gary Keck said the US was working with the Syrian Government to determine precisely where the attack occurred. Syria has been under intense pressure from America not to provide sanctuary to Saddam Hussein or any other Iraqi fugitives following the war in Iraq. **Saddam targeted?*** US Special Forces, backed by AC-130 gunships and helicopters, took part in the attack on the convoy, which was reported to have been traveling near the western Iraqi city of Qaim, near the Syrian border. An unmanned aircraft, or drone, was also involved in the operation. US defence officials said a number of people were killed in the attack. Officials said 20 people in the convoy were arrested and questioned and most of them were released. Intelligence reports had apparently suggested that the convoy included ousted Iraqi President Saddam Hussein and his sons Uday and Qusay. There has been widespread speculation that the attack was an attempt to kill Saddam Hussein. But the Americans have said there is no evidence that he was among those killed. It is unclear how the Syrian border guards came to be involved. **US Troops Attacked at Fallujah Power Station*** Unknown assailants launched rocket-propelled grenades overnight at US troops guarding a power station in the flashpoint town of Fallujah, west of Baghdad, an AFP correspondent reported. One Iraqi man was killed by US tank fire during subsequent searches. The attack occurred at 1:15 am at a power distribution station, when an unknown number of men fired two rocket-propelled grenades (RPGs) at the US troops guarding the facility, the correspondent witnessed. There was no major damage caused to the power plant. US troops immediately fanned out around the al-Dubat neighbourhood, with tanks and infantry opening fire. One man, identified as Feras Fawzi al-Saab, 30, was standing at the gate of his house when he was shot dead, the reporter added. The man was decapitated by the shots. US soldiers guarded the corpse, refusing to allow residents to remove it, he added. **Five Iragis Killed in Ramadi*** Meanwhile, residents of Ramadi, 60 miles west of Baghdad, reported another attack and said that U.S. troops killed four Iraqi civilians after that, there was no word on U.S. casualties. **PHOTO CAPTION*** U.S. soldiers from the 1st Armored Division keep alert atop an Abrams tank at a check point near Fallujah, about 25 miles west of Baghdad, Friday, June 20, 2003. (AP Photo/Victor R. Caivano)