An after-school argument near a San Bernardino high school led to the shooting death of a 15-year-old Rialto boy Monday afternoon, authorities said.

Detectives on Tuesday were trying to piece together a possible motive for the shooting, which happened just three blocks from Arroyo Valley High School on the 1100 block of North Wilson Street.

"Obviously there was some sort of personal issue. The detectives are still investigating," said Lt. Paul Williams, spokesman for the San Bernardino Police Department.

Williams said the victim in the San Bernardino incident, Anthony Dewayne Mitchell, did not attend the high school but the three suspects taken into custody did go to the school. Witnesses told police that a flurry of shots were fired during the altercation, but no other injuries were reported.

Mitchell was rushed to Arrowhead Regional Medical Center in Colton, where he died of his injuries.

Three suspects in the shooting were arrested and all face murder charges. Two suspects are juveniles from San Bernardino, one age 15 and the other age 16. The other suspect arrested was Lemonta Markuis Maddox, 18, also of San Bernardino.

Police executed three search warrants after the school and recovered a weapon they suspect may have been involved in the shooting, Williams said.

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