The Mackinac Bridge closed for several hours Sunday for a bomb threat, officials have said.
The Mackinac Bridge Authority said in a tweet that the bridge was closed at 2:15 p.m. Sunday after law enforcement reported a bomb threat.
After an "extensive search," nothing was found, the authority said.
The bridge had been reopened by about 5:10 p.m., according to a tweet from a Mackinac County 911/ Emergency Management Twitter account connected to the Mackinac County website.
The incident remains under investigation, officials said.
Officials did not, at first, report the reason for the closure. The 911 Twitter account announced in a tweet about 2:30 p.m. that the bridge was closed to all traffic because of "an emergency incident." Citizens were told to avoid the area.
The Mackinac Bridge Authority also acknowledged the closure online, but did not provide details.
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