Maryland State Police spokesman Greg Shipley to WJZ there was another bus - right behind the student's bus - carrying recruits from the Philadelphia Police Department to Washington for Police Week activities. That child was taken to the Alfred I. duPont Hospital for Children in Wilmington, Delaware.
Firefighters respond to an overturned bus on I-95 southbound, Monday, May 17, 2017 in Havre de Grace, Md. Cpl.
Others were transported to area hospitals by ambulance.
Preliminary information indicates SB passenger auto attempted to pass bus, lost control, came back across lanes, clipping front of bus, according to Maryland State Police.
Book bags and accident debris were strewn across all the southbound lanes of I-95, according to WBAL.
According to police, their preliminary investigation has found the driver of passenger vehicle tried to pass the bus in the left lane, but lost control of his vehicle for unknown reasons. However, the police department suggested that a passenger auto was allegedly involved in the incident in some way. Nine patients were taken to another of the university's hospitals in Havre de Grace.More news: 'Terminally ill' Moors Murderer Ian Brady urged to reveal victim's burial site
One woman was flown to the University of Maryland Medical Center's trauma center in Baltimore, but was still being triaged, the University of Maryland Medical System said in a statement.
Maryland State troopers, members of Havre de Grace's Susquehanna Hose Company and other first responders are also on the scene. Two passengers - one adult and one child - were airlifted from the crash site with critical injuries.
Werner Coach president Heath Ochroch confirmed to NBC10 Philadelphia that the bus belongs to his company in Phoenixville, Pennsylvania. The highway was stopped in both directions while helicopters landed, but northbound traffic is flowing again.
Authorities say a bus has overturned on Interstate 95 in northeastern Maryland and several people are injured.
Officials say more than 25 people were hurt.