Military officials say three U.S. Army Reserve soldiers from upstate New York have been killed by a roadside bomb in Afghanistan.The Department of Defense has identified the soldiers as 29-year-old Staff Sgt. Dain Venne of Port Henry, 22-year-old Spc. Ryan Jayne of Campbell and 27-year-old Spc. Brett Gornewicz of Alden. The Pentagon says they died of wounds suffered Saturday when enemy forces attacked their unit with an improvised explosive device in Paktia province.