The December 30th suicide bombing of a U.S. base in Afghanistan, revealed that one of the eight people killed was Ali bin Zeid, an agent for Jordanian intelligence. The fact that Zeid was identified was unusual, as the presence of Arab intelligence officials and commandos in Afghanistan is usually kept very quiet. But Zeid was a relative of the king of Jordan, and it was apparently thought better to just announce his "martyrdom" and avoid all the rumors that would appear otherwise.
One of the best kept secrets in the war on terror is the number of casualties among Arab commando and intelligence troops serving in Afghanistan. Several Arab nations have quietly contributed intelligence and commando units to the counter-terror effort there. This has been kept quiet, but is an open secret in the Persian Gulf and Afghanistan. These commandos are usually pretty busy back home, keeping local Islamic radicals in check. But some of their home-grown radicals have shown up in Afghanistan and Pakistan (usually after things got too hot for them back home), and it followed that these Arab governments allowed some of their counter-terror troops to continue the pursuit in the pro-Taliban areas of Afghanistan. Arrangements with the Pakistani government has allowed some of these operatives to work both sides of the border. These Arab counter-terrorists often get a crack at any Arab terrorists caught in Afghanistan, or Pakistan. The combination of interrogation skills, and cultural affinity, sometimes gets results where Western interrogators have failed.
There have been some casualties among the Arab commandos, who take part in combat operations. Those wounded or killed are referred to, if at all, as "international troops." The Arab operatives are eager to serve in Afghanistan, which is seen as the Big Leagues within the commando community. But there's also the self-interest angle. Many Arab counter-terrorist specialists are on al Qaeda's hit list, and some of these men even have prices on their heads. So it's sometimes a question of getting the other guy, before he gets you.