SAN FRANCISCO - A 35-year-old man was seriously injured last Saturday night when a stray bullet flew through his street-facing home amid a series of street fights involving teenagers, authorities and neighbors said.

What we know:

The shooting occurred shortly before 9 p.m. near Fulton Street and the Great Highway. Videos posted to social media showed 3 teens punching and pulling one person.

Another clip showed multiple scuffles spilling into the street.

Moments later, gunfire erupted, wounding four juveniles with non-life-threatening injuries, according to police.

A bullet struck a man, identified by loved ones as Nathan, after it flew through his glass balcony door. He had stepped toward the window to see what was happening outside, his loved ones said.

The round hit him in the ab

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