Kings of Leon drummer Nathan Followill is suffering broken ribs after an accident in the group's tour bus.  

The rock group's bus stopped suddenly last night to avoid hitting a pedestrian after a show in Boston.  

The injury is causing the band to postpone a concert scheduled for tonight at SPAC in Saratoga Springs.  

Kings of Leon has 30 shows scheduled over the next two months, including a dozen this month as part of their U.S. tour.