NASHVILLE, Tenn. (WKRN) — An investigation is underway after a crash involving a WeGo bus and a charter school bus in Donelson Tuesday morning.

The crash happened around 6:30 a.m. in the 3000 block of Elm Hill Pike.

The crash involved the two buses in addition to multiple passenger cars that appear to have crashed into the rear end of the school bus.

Multiple ambulances were observed leaving the crash site. The Nashville Fire Department reported it took three people to the hospital, including the driver of the WeGo bus, who has critical injuries. An adult passenger on the WeGo bus and the driver of a passenger vehicle were transported with non-life threatening injuries.

Three children who were on the RePublic charter school bus were taken to Vanderbilt Children’s Hospital. Other children were reunited with their parents who had the option to take them to their pediatricians or to the emergency room themselves. Metro police reported 10 children were on the bus at the time of the crash.

No additional information was immediately released.