Several U.S. students sustained minor injuries after a private school bus crashed into a building in northern Houston, Texas, on early Thursday morning, local media reported.The accident happened at around 7:15 a.m. local time when the bus carrying 30 students, aged from 7 through 13, went off a road and hit an empty building, according to local TV channel KTXS.Authorities said a student and the bus driver were taken to a hospital due to minor injuries. Several other students were treated at the scene.The cause of the crash was under investigation.