Family and friends gathered for a vigil in Mott Haven on Friday to honor 14-year-old Caleb Rijos, who was fatally stabbed last week while on his way to school.

A balloon release and an electric, mobile billboard with Caleb’s picture were part of the event.

Police said the teen was killed in an unprovoked attack.

It happened Jan. 10 around 9:30 a.m. near 138th Street and 3rd Avenue in Mott Haven.

Waldo Mejia, 29, was arrested and charged with Caleb’s stabbing.

Police said the Bronx man has several arrests and mental health problems.

Caleb was a freshman football player at Bronx Leadership Academy.

“[Caleb was] such a nice kid, such a beautiful kid,” said Delnyse, who said she was a former classmate of Caleb’s. “If the room was dark, he was always the light of the mood. He was just adorable. ”