Unprovoked Attack Came Before Suicide

An unidentified man hang-gliding at San Francisco's Fort Funston is in critical condition after he and another hang-gliding enthusiast were shot by a man on the ground Monday.

In fact, the FBI says 59-year old Will Smith fired at three hang-gliders... before he turned the gun on himself. The attacks appeared unprovoked.

An off-duty police officer who happened to be in the national park at the time was keeping an eye on Smith... whom he said appeared out of place. Officers say before the attack, Smith confronted a dog-walker at the park, as well... but without violence.

That was before the distraught man -- who was reportedly bankrupt, and had just been evicted from his home -- opened fire with a .22 caliber pistol.

One man was hit in the head and chest just as he landed, causing life-threatening injuries... and his condition hasn't improved. Another man tried to run away... but was shot in the leg before he could be helped to safety by several bystanders.

A third hang-glider pilot escaped uninjured.

Authorities are still interviewing witnesses, including those in the local hang-gliding community. They're also trying to reach the seriously injured man's family, who is reportedly on the East Coast. The FBI is handling the criminal investigation.

FMI: www.fbi.com