Trial witnesses and dozens of other guests were forced out of their rooms and down the fire stairs as piercing alarms blared throughout the downtown Hotel Du Pont at 9:30 pm.

Hunter and wife Melissa Cohen have been discreetly staying at the $400-per-night hotel this week but were nowhere to be seen among the crowd of evacuees standing in the rain outside the 111-year-old building.

Morris refused to comment when asked by The Post if the couple had been whisked away by the Secret Service.

Evacuees were ushered through a tunnel into the neighboring DECO Food Hall while firefighters dealt with what appeared to be smoke billowing from the Du Pont kitchen.

The apparent emergency was over by 10:20 pm and hotel guests returned to their rooms or the hotel bar.

The Wilmington Fire Department did not respond to The Post’s request for comment.

A person who answered the listed phone number on the hotel website told The Post she was not at the hotel and was unaware of any fire.

The 53-year-old first son’s trial will resume Thursday at 9 a.m., with jurors continuing to hear testimony from Gordon Cleveland, an employee at the Delaware gun store where Hunter purchased a .38 caliber revolver while allegedly in the throes of a crack cocaine addiction.

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Hunter is accused of lying about his illegal drug use on a federal form when he purchased the firearm.

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He faces a maximum of 25 years in prison if convicted of the three felony counts against him.