DENVER (AP) -- Law-enforcement officials say a man suspected of leaving a pipe bomb and propane tanks at a Denver-area shopping mall has been arrested.

Boulder Police spokeswoman Kim Kobel says 65-year-old Earl Albert Moore was captured Tuesday at a grocery store in Boulder, roughly 30 miles northwest of where the bomb was found.

Authorities have been searching for Moore since the explosives were discovered April 20 at the Southwest Plaza Mall in the south Denver suburbs.

The bomb and tanks were found after a fire, but they didn't detonate. No injuries were reported.

The fire occurred on the 12th anniversary of the shootings at Columbine High School not far from the mall. The FBI says it's unlikely the mall incident was related to Columbine.

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