KABCSurveillance video captures two mail thieves stealing from mailboxes in Lake Balboa on Monday, May 8, 2017. LAKE BALBOA, LOS ANGELES (KABC) -- Police are searching for thieves who struck nearly 20 mailboxes in one night in Lake Balboa.The theft happened Monday in a neighborhood on Amestoy Avenue and Cantley Street. A total of 18 mailboxes were broken into and had items stolen.Police and the U.S. Postal Service were notified about the theft but no arrests have been made.