WASHINGTON (AP) — President Donald Trump’s motorcade took a different route than usual to the airport as he was departing Florida on Sunday due to a “suspicious object,” according to the White House.

The object, which the White House did not describe, was discovered during security sweeps in advance of Trump’s arrival at Palm Beach International Airport.

“A further investigation was warranted and the presidential motorcade route was adjusted accordingly,” White House press secretary Karoline Leavitt said in a statement Sunday.

The president, when asked about the package by reporters, said, “I know nothing about it.”

Trump left his Palm Beach, Florida, club, Mar-a-Lago, around 6:20 p.m. for the roughly 10-minute drive to the airport, but took a circular route around the city to get there.

During the drive, police officers on motorcycles created a moving blockade for the motorcade, at one point almost colliding with the vans that accompanied Trump.

Air Force One was parked on the opposite side of the airport from where it is usually located and the lights outside the plane were turned off.

Anthony Guglielmi, the spokesman for U.S. Secret Service, said the secondary route was taken just as a precaution and that “that is standard protocol.”