A school bus slammed into a tree in Butler County on Thursday morning, sending the driver and two Mars Area elementary students to the hospital. According to the Adams Township police chief, there were 30 to 40 students on board when it crashed on Three Degree Road near the township park.

Emergency responders are headed to the scene of a crash involving a school bus in Adams Township. Officials confirmed to Pittsburgh's Actions News 4 a Mars School District bus crashed in the 1600 block of Three Degree Road in Butler County Thursday morning.

A school bus crash in Butler County led to a bus driver and two students being injured. KDKA-TV's Lauren Linder and Barry Pintar have the story including reactions.