An ongoing suspicious device investigation in Marina del Rey is connected to the explosion that killed three detectives last week, the Los Angeles County Sheriff's Department confirmed. AIR7 flew over the active search was active in the 4200 block of Via Marina on Tuesday evening.

Officials served a search warrant in Marina del Rey on Tuesday as they continue to investigate a deadly explosion that killed three sheriff’s deputies.

Investigators say they are following leads to determine the origin of grenades that were discovered inside a Santa Monica storage area and transported to East L.A., where the explosion occurred Friday.