Homemade bombs found in mailboxes in Indiana

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ANDERSON, Ind. -- Authorities in Indiana are investigating a string of mailbox bombings.

There were at least four incidents in Anderson, Indiana over the weekend.

Officials say the explosives called "works" bombs, were made from common household material placed in plastic bottles and allowed to build pressure so they would explode.

So far, there have been no reports of injury, but police say the devices are extremely dangerous.