The Bills issued an update on the health of safety Damar Hamlin early Tuesday morning, saying the 24-year-old remains in critical condition after he went into cardiac arrest during the first quarter of Monday’s game against the Bengals.

Hamlin is currently sedated and receiving treatment at the University of Cincinnati Medical Center following a harrowing scene at Paycor Stadium that left bystanders distressed and ultimately led to the postponement of the AFC matchup.

The Bills said in a tweet at 1:48 a.m. ET that Hamlin’s heartbeat was restored by medical personnel on the field before he was loaded into an ambulance and taken to the hospital.

The game came to a stop when Hamlin collapsed after tackling Bengals wideout Tee Higgins. Hamlin initially got up off the ground and to his feet following the play, but then collapsed. He was administered CPR on the field and was then taken away in an ambulance.

Hamlin was then transferred to the University of Cincinnati Medical Center. He was accompanied in the ambulance by his mother, play-by-play announcer Joe Buck said during ESPN’s broadcast.