WELD COUNTY, Colo. -- At least 29 people have been injured in a school bus crash in Weld County Thursday afternoon.

The crash happened near the intersection of County Roads 49 and 24, northeast of Hudson.

Greeley-Evans School District 6 confirmed that the bus was coming back from a day trip to Elitch Gardens in Denver.

The students aboard the bus were from Greeley Central High School and Northridge High School.

Colorado State Patrol said the school bus collided with a truck. The agency said that after its initial investigation, it appears the truck driver fell asleep.

CSP said about 36 people were on the bus.

Children's Hospital in Aurora, Platte Valley Medical Center in Brighton and North Colorado Medical Center in Greeley are treating patients. PVMC has six patients: four children and one adult in good condition, and one adult in fair condition. NCMC said it received 17 patients. Children's said it is treating six patients aged 15 to 18 years old. All of the patients at Children's are in good or fair condition.

One patient in serious condition at NCMC was airlifted to another hospital.



A witness who said he helped those hurt in the crash told FOX31 the bus passengers experienced a range of injuries and that at least two people appeared to have broken bones.

"The kids were all pretty calm for the most part," the witness said.

Authorities had closed all northbound lanes and one southbound lane of County Road 49. It reopened shortly before 8:30 p.m. Thursday.