A school bus carrying the Aliquippa Junior High football team overturned on a sharp bend north of Pittsburgh, Pennsylvania, on Saturday, leaving 21 of the 28 passengers injured and hospitalised, officials said.The bus, which was transporting 25 students and three adults to a scheduled game in Gibsonia, crashed in Economy Borough, about 20 miles from Pittsburgh, according to AP.Economy Borough police chief Michael O’Brien said the vehicle tipped onto its side before righting itself as students evacuated. He noted the accident occurred at a “bad bend” in the road, and investigators are examining the cause.Authorities did not provide details about the medical conditions of those injured.In a statement on Facebook, the Aliquippa Junior High football team said all players were being evaluated and urged “a thought or prayer for each player or coach that was traveling this morning.”