LITTLE ROCK, Ark. - Three former world leaders were forced to take shelter in the lower level of an Arkansas high school after tornado sirens blared during a graduation ceremony for the Presidential Leadership Scholars Program.

Former Presidents George W. Bush and Bill Clinton and former Britain Prime Minister Tony Blair were attending the ceremony at Little Rock's Central High School when the storm struck Thursday night. The attendees were moved to the lower level of the high school, and a spokesman for Clinton says the three leaders also took shelter downstairs, away from the crowd.

The powerful thunderstorm downed trees and power lines throughout Little Rock, but no major damage or injuries were reported. Once the storm passed, the leaders went to the Clinton Presidential Center for a dinner with the presidential scholars.