It looks like Bernie Sanders is out of the race for President.

Presidential hopeful Bernie Sanders on Wednesday canceled all appearances and events until further notice after the 78-year-old senator underwent a procedure for an artery blockage.

In a statement Wednesday, the senator’s advisor Jeff Weaver said Sanders “experienced some chest discomfort” during a Tuesday event. Testing found a “blockage in one artery,” and Sanders had two stents inserted, he said.