Federal investigators are increasing the public reward for information that leads to the "location, arrest & conviction of the person(s) responsible for the pipe bombs found in DC on Jan. 6"

The reward, originally set at $50,000 one day after the pipe bombs were first discovered, is now $75,000, according to a tweet published Thursday by the FBI's Washington Field Office.

According to the notice, both the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives are searching for at least one suspect who is responsible for placing suspected pipe bombs in Washington, D.C., on Jan. 6.

Read more: NBC News