Authorities in Lehigh and Northampton counties say thieves are working under the cover of darkness to break into mail collection boxes.
The locations affected include Catasauqua, Coplay, Whitehall and Laurys Station as well as Northampton County.
The incidents took place between Saturday night into Tuesday morning.
"Several of these boxes were destroyed so they are obviously using some serious tools to break into these things because breaking into them is not easy," said George Clark a U.S. Postal Inspector based out of Philadelphia.
Police say the break-ins happened overnight so if you think your personal information was exposed, check your accounts for any suspicious activity.
"If it needed to get somewhere, they should monitor that destination and see if their letter or bill payment got to where it was supposed to get to and if it didn't, then obviously try to cancel that check," said Clark.
Clark says to protect yourself from becoming a victim of such break-ins you can always drop your mail off inside the post office itself or avoid leaving your mail overnight inside the collection boxes.
Anyone with information is asked to call police or the U.S. Postal Inspection Service at 1-877-876-2455.
Allentown, PA 18102