The U.S. Postal Service is investigating vandalism at a North Austin post office.
Vandals broke the windshields on about 50 postal vehicles at the Bluebonnet Station at Metric Boulevard and Braker Lane.
The crime occurred sometime between the time it closed at 6 p.m. Saturday and Monday morning, when the damage was discovered.
Investigators don't know whether the vandalism was committed by someone who works at the post office or had worked there in the past.
They're looking at surveillance tapes and checking employee records for possible motives.
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Going postal
 News 8's Kendra Mendez reports from North Austin.



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"Vandalism for post offices is extremely rare. This is a very rare occurrence for us, and something that we take very seriously because of the money involved and the potential delay of mail," U.S. Postal Inspector Michael Sullivan said.
Mail delivery will not be affected. Sullivan said spare trucks have been brought in from other stations for delivering the mail and several crews are working to replace the glass on the damaged trucks.
The U.S. Postal Investigation Service is offering a $5,000 reward for information that leads to an arrest. Call (512) 342-1540 to report any information.