A 12-year-old boy was shot in Harlem on Sunday night and ran bleeding into a bodega where people called for help, sources said.

The victim was struck in the leg on East 113th Street near Lexington Avenue at around 8:30 p.m. and quickly ducked into El Barrio Superette, according to police sources.

“When he walked into the store, he just fell down,” said a witness Larry Glen. “He was like bleeding and whatever and they took him to the ambulance.”

The youngster was transported to a hospital where he was listed in serious but stable condition.

Cops were searching for the gunman Sunday night.