It’s a rare thing for golfers to see a hole-in-one any time they go to a course. Fitzgerald Craan saw something even rarer early Monday evening while playing Jackson Park Golf Course on Chicago’s South Side.

Chicago police say the National Transportation Safety Board is investigating the incident, along with the Federal Aviation Administration.

The Chicago Fire Department said that a helicopter made a controlled landing at the Jackson Park Golf Course, located at 6401 S. Stony Island Ave, around 6 p.m.

A helicopter was forced to make an emergency landing at a golf course in Chicago’s Jackson Park neighborhood on Monday evening. According to Chicago fire officials, the helicopter landed after what was described as a mechanical issue,

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