A special needs teacher and an 8-year-old boy were shot and killed in a murder-suicide at a Southern California elementary school, police said Monday.

San Bernardino Police Chief Jarrod Burguan said 53-year-old Cedric Anderson walked into North Park Elementary School and opened fire on his wife, Karen Elaine Smith, also 53, shortly before 10:30 a.m. local time before taking his own life.

Two adults are deceased in a classroom, believed to be a murder suicide. We believe the suspect is down and there’s no further threat.

— Chief Jarrod Burguan (@SBPDChief) April 10, 2017

Two students were wounded in the shooting. One of them, identified as 8-year-old Jonathan Martinez, was later pronounced dead at a local hospital. The other injured student, aged 9, was in stable condition.

Burguan said both students were standing behind Smith when the shooting began, but he does not believe they were targeted. The chief said Anderson had a criminal record, including weapons and domestic violence charges, but said he had no specifics.

Police say Cedric Anderson, left, shot and killed his estranged wife, Karen Smith

The chief said Anderson and Smith had only been married for a few months and had been estranged for at least a month.

“No one has come forward to say they saw this coming,” Burguan said.

A post on what appeared to be Karen Smith’s Facebook page invited friends to the couple’s wedding in January. The following month, Anderson posted a 12-second video in which he said Smith was “making me really happy” and “knows when to ignore me.”

“That makes a happy marriage,” Anderson added.

San Bernardino City Unified School District superintendent Dale Marsden said Anderson was “known to staff” at the school and told workers that he had come to drop something off for his wife before the shooting.

The 600 other students at the school were bused to safety at California State University’s San Bernardino campus, several miles away. Television news footage showed…