Not too many details are currently available but WESH indicates that the accident occurred at Fort Wilderness Trail and Big Pine Trail.
WESH and the Orlando Sentinel are reporting that a Disney Bus rear-ended a Mears Transportation near the Epcot Toll Plaza earlier today at approximately 2:30 pm ET, injuring eight with the driver of the Disney Bus having been airlifted to the hospital in a ‘very serious condition.’ There were 20 guests in all aboard the Disney Bus with only the driver aboard the Mears bus.
UPDATED at 3:35 pm
WESH is reporting that two Disney Transportation buses collided this afternoon near the Contemporary Resort. They report eight to fourteen guests have been sent to Celebration Health for treatment but that all injuries appear to be minor. You can read their coverage here.
Also tweeting live from the scene was Disney Moms Panelist Erin Foster.