NEVADA (FOX NEWS): Democratic presidential primary contender Bernie Sanders is off the campaign trail for a few days after he had emergency surgery Tuesday to repair a blocked artery, his campaign announced.

The campaign said Wednesday that doctors have inserted two stents, and the candidate is now “conversing and in good spirits,” but will be taking a few days to rest.

“We are canceling his events and appearances until further notice, and we will continue to provide appropriate updates,” Sanders’ campaign said in a statement.

The Vermont senator began to experience some chest discomfort during an event on Tuesday evening in Nevada and was taken to the hospital for a medical evaluation and treatment, where it was discovered that he had a blocked artery.

Sanders is one of the frontrunners in a crowded field vying to be the party’s 2020 presidential nominee and take on President Trump in the general election.

His campaign manager, Faiz Shakir, was on a telephone call with supporters Tuesday night but didn’t mention any health concerns about the candidate. Shakir said the “state of the campaign is strong” and he played up Sanders’ strong fundraising total for the third quarter.

Sanders recently canceled some appearances in South Carolina because he lost his voice. The campaign said at the time he felt fine.