Police are asking for public assistance in finding who is responsible for placing an explosive device in a Morrison family's mailbox Wednesday morning.

Damage was done to both the interior and exterior of the home.

Crime Stoppers is offering a $1,000 reward for information leading to an arrest. The United States Postal Service is offering $500.

Anyone with information is asked to call the Morrison Police Department at 815-772-7659 or Whiteside County Crime Stoppers at 877-625-7867.