A 19-year-old man is in a critical condition at Cork University Hospital after he is believed to have ingested a substance while attending the Indiependence music festival at Mitchelstown in Co Cork.

It is believed the man walked into the medical centre at the festival and complained of feeling unwell.

He was treated there before being transferred to Cork University Hospital, where his condition deteriorated.

RTÉ News understands he is now in a critical condition.

The man is not from Cork, but is from a nearby county.

Cork University Hospital has tweeted that they treating a single patient with severe illness and they have been in contact with the festival organisers and medical team at the event in Mitchelstown.

Earlier the hospital had asked people to circulate a message to those attending Indiependence to stay safe.

Festival organisers have urged people not to consume any substance they are unsure of.

In a statement this evening, a spokesperson for the Indiependence festival said that there has been one drug-related transfer to Cork University Hospital from the festival. 

The spokesperson added that a 19-year-old was treated at the festival before being transferred and his condition is being monitored at the hospital.