A Wawasee Community School Corp. bus collided Wednesday with a dump truck in Marshall County, and seven students and two adults were treated at a Plymouth hospital.
The bus, carrying 47 students and two adults, was traveling west on U.S. 30 shortly after 10 a.m., Indiana State Police at Bremen said in a statement.
It said the bus disregarded the red light at King Road east of Plymouth and collided with an eastbound dump truck turning left onto King Road with a green arrow.
The bus struck the dump truck in the passenger's side, the statement said.
Police said six of the students complained of pain and were taken to St. Joseph Hospital in Plymouth, where they were treated and released. The bus driver, Patricia S. Myers, 59, of Syracuse, also was taken to the hospital with arm pain.
The driver of the dump truck, Scott J. Morrison, 57, of Ora, Indiana, was not injured, police said.
They said the crash investigation is continuing, but drugs or alcohol do not appear to be factors.
Joy Goshert, the district's director of curriculum, says that after the crash, all of the students returned to Wawasee Middle School, where they were met by school nurses while parents were notified.
Goshert said the students had been on a field trip to a water park as a reward for working during the school year on positive behavior.
State police said they were assisted by Marshall County police, the Plymouth fire and EMS departments, Union North EMS and several Wawasee school officials.
The Associated Press contributed to this article.