Jean-Marie Le Pen, the former far-right leader in France, suffered a "mild heart attack" and was taken to hospital on Saturday, a close source said.
"Jean-Marie Le Pen has been hospitalised in a public institution in the Paris region. His family and friends are concerned but calm," the 94-year-old's advisor Lorrain de Saint Affrique said, confirming a story run by Le Point news magazine.
Le Pen remains "conscious," he added.
Le Pen, father of current far-right leader Marine Le Pen, has been hospitalised several times in recent years.
In February 2022, Le Pen senior was hospitalised after suffering a "minor" stroke.