Amid questions about Iran's involvement with the Taliban in Afghanistan, U.S. Defense Sec. Robert Gates addressed the issue at a Thursday briefing.
"Based on everything that I've seen, I continue to believe that the Iranians are involved," Gates said. "But it remains at a relatively low level and we certainly would hope that it stays that way."
Earlier this week, U.S. military and intelligence officials said Iran is helping train Taliban fighters within its borders. The United States has already said that the Taliban may be receiving limited training from the Iranians in Afghanistan itself, but officials told CNN that training in the use of small arms was occurring within Iran.