This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Please enable Javascript to watch this video

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.

40.10532 -85.680254