The reward is now up to $1,800 for information leading to the arrest and conviction of the people responsible for the bomb scare in the Marquette area on Black Friday.
The Mining Journal announced a $500 reward Saturday.
Publisher Jim Reevs also challenged other area businesses to add to the reward fund.
Some of them have, like Wal-Mart, Econo Foods, Holiday Inn and the Westwood Mall.
Anyone with information related to the bomb threats is asked to call the Marquette Police Department at 228–0400.