A small fire at Fore Street restaurant in Portland has closed the establishment for Thursday and Friday.

Portland fire Capt. David Nichols said the department received a call about the fire at 3:05 p.m. Thursday.

It was contained to an HVAC unit near the wood-fired grill, and Nichols said it was under control within 15 minutes. He did not know what started the fire.

No one answered the phone at the restaurant, but a message on the answering machine said the restaurant would be closed Thursday and Friday nights “due to unforeseen circumstances.”

“If you have a reservation, we will not be able to honor those at this time,” the message stated.

The message directed callers to sister restaurants, Scales and Street and Co.

Standard Baking Co., which is located in the same building but on the Commercial Street side, said it will be open Friday.

“We are in the bakery tonight mixing and shaping bread dough to be baked tomorrow morning!” bakery owner Alison Pray said in an email Thursday night.