Cops are searching for at least four armed men involved in a home invasion in Brentwood.

Homeowner Julio Martinez says he returned to his Grand Boulevard home early Monday morning to find his wife tied up at gunpoint. Martinez says the robbers also threatened to kill his 8 and 2-year-old children.

Martinez says the suspects got into the home by knocking on the front door and asking for him by his first name. He adds that he doesn?t know the suspects, who fled in two dark-colored vehicles.