Damar Hamlin suffered cardiac arrest during the game against the Cincinnati Bengals on Monday night, and remains in critical condition, the Buffalo Bills said in a statement on Twitter in the early hours of Tuesday.
"Damar Hamlin suffered a cardiac arrest following a hit in our game versus the Bengals," the statement said. "His heartbeat was restored on the field and he was transferred to the UC Medical Center for further testing and treatment. He is currently sedated and listed in critical condition."