Jefferson Starship broke the news to fans via their Facebook page and also revealed that they will be continuing their current North American tour without him.

The band wrote on Wednesday, "Hey everybody, Paul's health took a bad turn this week. He's in the hospital, stable and undergoing tests to find out exactly what's going on but doctors suspect he had a heart attack. He is in the best possible care and we are sending him all of our best wishes, good thoughts and healing vibes.