Residents living in one North County neighborhood were awakened by blasts, an armored vehicle and federal agents with their weapons drawn as officials served warrants in an ongoing investigation.
FBI agents and San Diego Police Officers used two flash bombs on residents in a home on Worthing Avenue, north of Mira Mesa Boulevard and west of Interstate 15.
A spokesperson for the San Diego FBI told NBC 7 the search warrant was served as part of an ongoing investigation.
There are several people home at the time, including a grandmother and two young grandchildren.
Agents conducted a four-hour search of the home and cars in the driveway and yard.
Some items were taken from the home but there is no word on what they found.
One person was arrested as a result of the operation but not for federal charges.
There is no other information available.