Bills safety Damar Hamlin collapsed on the field, was given CPR by medical professionals, put into an ambulance, and rushed to an area hospital in one of the scariest on-field scenes in NFL history during a “Monday Night Football” game in Cincinnati. 

Hamlin, 24, suffered cardiac arrest and is in critical condition, according to a statement from the Bills late Monday. 

“His vitals are back to normal and they have put him to sleep to put a breathing tube down his throat,” Jordon Rooney, Hamlin’s marketing representative at Jaster Athletes, wrote on Twitter in an update about an hour after the league’s statement. “They are currently running tests. We will provide updates as we have them.” 

A hospital spokesperson canceled a news conference, originally scheduled for around 11 p.m. Monday, according to multiple reports. Hamlin’s agent, Ira Turner of Agency 1 Sports, released a statement asking to “please continue to pray for Damar and his family.” 

Hamlin and his mother, who was watching from the stands, were taken two miles away to the University of Cincinnati Level I trauma center in what was treated as a life-or-death emergency. The ambulance left Paycor Stadium about 30 minutes after the emergency began when Hamlin made a first-quarter tackle on Bengals receiver Tee Higgins but appeared to take the brunt of the hit.