Flight reductions ordered by the Federal Aviation Administration began Thursday at Logan International Airport — one day earlier than expected, officials said.

U.S. Transportation Secretary Sean Duffy said during a press conference Wednesday that he would order a 10% cut in flights at 40 major airports due to air traffic control staffing shortages caused by the federal government shutdown . He said the cuts would start with a 4% reduction on Friday, then increase to 10%.

Officials at Massport, the agency that operates Boston’s airport, said in a statement on social media Thursday afternoon that they have begun to see cancellations for Friday.

“We are expecting airlines to reach out ot passengers directly,” they said. “We urge passengers to check with their airline before coming to

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