According to Kansas City Missouri Police Department, three vehicles were involved in the crash, which occurred on the southbound ramp onto Interstate 435 from Stadium Drive near Arrowhead Stadium, the Chiefs' home field.
Police said a Chevy Impala was disabled on the ramp, and the driver called family members for assistance. His family members arrived and parked their Chevy Traverse south of the disabled car. A Dodge Ram truck struck both vehicles. A 4-year-old and 5-year-old in the Traverse were transported to a local hospital, with the 5-year-old sustained life threatening injuries, police said.
The condition of the children was unknown Friday night. The drivers of the Impala and Traverse were not injured, police said.
The driver of the truck sustained non-life threatening injuries and was being investigated for impairment, according to the police incident report.
In a search warrant first obtained by CNN affiliate
KSHB, police identified Britt Reid as the driver of the Dodge Ram truck. Reid told a responding officer that he had consumed "two to three" drinks after the officer observed an odor of alcohol "emanating" from Reid as well as "bloodshot and red" eyes. Reid also told the police that he takes prescription Adderall, according to the search warrant.
The officer conducted a field-sobriety test and observed signs of impairment, the warrant states.
Reid was taken to a local hospital after complaining of stomach pain.
Reid has not been charged with any crime at this point.
According to the search warrant, a computer check performed by police revealed Reid has had "multiple prior DUI contacts." The police sought and received a judge's permission to collect blood from Reid to assist with their investigation.
In a statement, the Kansas City Chiefs said, "The organization has been made aware of a multi-vehicle accident involving Outside Linebackers Coach, Britt Reid. We are in the process of gathering information, and we will have no further comment at this time. Our thoughts and prayers are with everyone involved."
The Chiefs are scheduled to play the Tampa Bay Buccaneers in Super Bowl LV on Sunday in Tampa, Florida. The Chiefs plan to fly to Tampa on Saturday.
The Chiefs have not said whether Reid, who serves as the team's outside linebackers coach, will travel with the team. The team has not responded to requests for additional information.