Updated at 10:15 p.m. EST, Dec. 18, 2009 Iranian troops briefly entered a disputed border area of Iraq and seized an oil well. No fighting was reported there, but two Iraqis were killed and four others were wounded elsewhere in Iraq. Iraqi investigators have finished excavating a mass grave containing 185 Kurds that dates to the Saddam era. Meanwhile, Admiral Michael Mullen visited troops near Nasariya, and Iraq war vets are finding organic farming to be great therapy in California. In the United Kingdom, the families of two men who were kidnapped in Iraq two years ago asked for their safe return; the bodies of three colleagues were returned earlier this year.