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DETROIT (AP) -- The FBI believes there's a firm connection between the attempted robbery of a jewelry store in the Grand Rapids area and a major theft at a store in suburban Detroit.

Detroit FBI chief Paul Abbate held a news conference Friday to ask the public for information that could lead to arrests in the April 22 incidents. He says he has a "high degree of confidence" that they're related. There's a $25,000 reward.

RELATED: Store employee opens fire on gunmen, one wounded

Four people attempted to rob a Paul Medawar jewelry store in Kent County before one of them was shot. Five hours later, more than 100 Rolex watches were stolen at a Tapper's jewelry store in West Bloomfield, 140 miles away.

Investigators believe the three armed robbers at Tapper's got help from getaway drivers and lookouts.

The Oakland County Gang and Violent Crime Task Force is helping with the investigation.

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