A McHenry County jail inmate suffered “serious injuries” after falling down a flight of stairs Thursday morning at the correctional facility in Woodstock, officials report.

A male inmate “fell down a flight of stairs within the jail” about 6:30 a.m. Thursday, according to a McHenry County Sheriff’s Office news release. No other inmates or officers were around when the fall happened, according to the release.

The Woodstock Fire/Rescue District responded to the call at 6:51 a.m., according to Communication Specialist Alex Vucha. Paramedics arrived within minutes to assess the man who fell “approximately 10-15 stairs,” Vucha said.

The man was conscious and breathing when taken to Northwestern Medicine Woodstock Hospital. He was later flown to Advocate Condell Medical Center in Libertyville hospital, Vucha said.