Ramon Nunez is accused of selling drugs to two teenagers who were hospitalized Saturday. Officials are still investigating whether he’s responsible for the deaths of two other teens that same day.

A 21-year-old man has been arrested after Santa Rosa police say they believe he is linked to the deaths of two high school students who died from possible fentanyl overdose.

Four teenagers in Santa Rosa overdosed on suspected fentanyl over the weekend, and two died, police said Sunday night.