Bernie Sanders, one of the Democratic presidential candidates, has suffered a heart attack.
The 78-year-old was campaigning when he experienced chest discomfort and was taken to hospital.
Medics there confirmed he had a heart attack, his campaign team has said.
The senator had surgery where doctors in Las Vegas inserted two stents to open up a blocked artery in his heart.
The attack happened on Tuesday but was confirmed after he was released from hospital yesterday. Read more