An 18-year-old Greenfield man has been arrested on two counts of murder with criminal street gang enhancements in the Nov. 2 shooting at Moss Landing that killed two Salinas teenagers, the Monterey County Sheriff's Office said.

Why it matters: The killings of Nathaniel Flores, 13, and Marco Antonio Perez, 15, shook Salinas schools and families, and the investigation is still active, KTVU reported. Officials have not given a motive.

The arrest

Donald William Breeden was arrested after detectives served search warrants Thursday, Nov. 5, at about 3 p.m. in the 900 block of Maple Avenue in Greenfield, where three people were detained, and at about 6 p.m. in the 45000 block of Crown Avenue in King City, KSBW reported. SWAT, a special response unit and State Parks assisted. Breeden's bail is set at $2.035 million.

"Our detectives have been working tirelessly," Sheriff Tina Nieto said. "While an arrest has been made, our work is not over."

The shooting

The shooting happened just before 2 a.m. Monday, Nov. 2, along Jetty Road. A third person arrived at a hospital with a gunshot wound, and a fourth person had injuries unrelated to the shooting. Both victims attended schools in the Salinas Union High School District, and Flores played for the Steinbeck Tigers youth football program.

Anyone with information is asked to call Detective Sgt. N. Kennedy at 831-755-3773.

Related: Our earlier report on the Moss Landing shooting.