bus crash
In this image, police stand near the wreckage of a school bus on Interstate 80 following an accident with a dump truck in Mount Olive Township, New Jersey, May 17, 2018. REUTERS/Mike Segar

At least 29 people were injured in a school bus crash that happened around 4 p.m. local time (6 p.m. EDT) in Weld County, Colorado, on Thursday afternoon. The school bus collided with a truck, causing the bus to roll and land on its side, the State Patrol said.

State Patrol troopers said the truck driver admitted to having fallen asleep and hit the school bus from the side.

Troopers said the driver of the truck fell asleep and hit the school bus from the side.

The Greeley-Evans School District bus was carrying 35 people including 29 high school students from both Northridge High School and Greeley Central.

Casey Pearson, a spokesperson with Greeley-Evans School District 6, said the bus was returning from a field trip to Elitch Gardens when the crash occurred northeast of Hudson near the intersection of County Roads 49 and 24 and the injured, including nineteen students, were taken to four different hospitals.

According to a release from the Children's Hospital in Aurora, 6 injured persons from 15 to 18 years of age were brought to the hospital and they are in fair condition now.

North Colorado Medical Center in Greeley received 5 patients and three of them were treated and released, a hospital spokesperson said.

According to Trooper Gary Cutler, the bus driver was also hospitalized after suffering serious injuries, local daily Denver Post reported. However, the present condition of the driver is unknown.

Officials on the scene confirmed there were no fatalities from the crash.

A witness told Fox 31 that two of the injured children appeared to have broken bones.

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

According to Stephanie Cooke with the Platte Valley Fire Protection District, all the passengers were able to get out themselves and people working at nearby oil and gas site helped the injured before the first respondents reached the site.

All the public safety agencies and at least six ambulances reached the scene within minutes of the accident. Families of the students reached along with the first respondents and many of the injured were treated at the scene after the crash.