Bills safety Damar Hamlin was taken off the field via ambulance after reportedly being administered CPR during the first quarter of Buffalo's Monday night game against the host Cincinnati Bengals, and the NFL subsequently postponed the contest.
The NFL announced that Hamlin, who collapsed on the field after making a tackle, was in critical condition. He reportedly was at University of Cincinnati Medical Center.
Hamlin received immediate medical attention on the field before being transported to the hospital, per the NFL statement.
According to the ESPN broadcast, medical personnel were administering CPR to Hamlin and also gave him oxygen as they loaded him into the ambulance.