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Detroit's airport has closed its northern terminal after a suspicious incident. Here, passengers wait to get through security. Reuters

Update as of 7:37 p.m. EDT: The North Terminal at the Detroit Metropolitan Airport, which was evacuated earlier on Saturday after a man acted suspiciously, is returning to normal operations, according to reports.

The suspect was detained while authorities investigated the incident, a report added, citing an airport spokesman. The man, who was not identified, reportedly left his laptop at a ticketing desk and spoke in a way that "caused concern," according to MLive.

A partial evacuation of the terminal, which serves domestic flights, was ordered about 3 p.m. and services reportedly began returning to normal about 90 minutes later.

Original story:

Detroit Metro Airport has evacuated its north terminal due to a "suspicious situation" on Saturday afternoon, according to a report from Detroit's WXYZ-TV.

According to a number of users on Twitter, a male suspect may have made a bomb threat, though reports are unconfirmed. Photos on social media also showed a number of people outside the airport standing with luggage. A tweet was also posted by an account that the news site says belongs to the Detroit Airport.

An unconfirmed source on Twitter also said the suspect "arrived with a open laptop and approached several employees before making the threat."

This is a breaking news story.