Sweden midfielder Kristoffer Olsson has been hospitalized with an acute brain condition after suddenly losing consciousness at home, his Danish club FC Midtjylland said Tuesday.

Olsson is on a ventilator in Aarhus University Hospital, the club said, while a team of Denmark’s leading medical experts work to make a diagnosis and begin the correct course of treatment.

Midtjylland said the 28-year-old Olsson lost consciousness on Tuesday last week and was transferred to the hospital, where he is surrounded by his immediate family and members