BOCA RATON, Fla. – Boca Raton police are investigating the theft of mail from a post office today, according to a police spokesperson. Police said someone wearing a mask stole about 400 advertising flyers that were being unloaded onto the loading dock in the back of the post office at 2800 North Military Trail in Boca Raton. After grabbing the flyers, the suspect loaded them into a vehicle and drove off.