Three men were wounded in a hail of bullets Saturday night at an East Harlem park.

Bystanders said the shots rang out just before 10 p.m. in crowded Jefferson Park, not far from locals enjoying a barbecue and an event for Manhattan Assembly candidate Edward Gibbs.

“They were having a ball at the barbecue,” said one attendee, who asked not to be identified. “[Then] I heard four shots.”

The victims were found by responders at separate locations around the park. They suffered serious but non-life-threatening injuries