A gun that someone threw out of a bus landed outside a campaign office of New York City mayoral candidate and Brooklyn Borough President Eric Adams, authorities said.

The incident started at around 1:45 p.m. Sunday when two men got into an argument aboard a city bus on Nostrand Avenue in the Crown Heights section of Brooklyn, police said.

One of the men pulled a gun, then dropped it on the floor of the bus and ran, a police spokesperson said.

Someone then threw the gun out of the bus, police said. It landed outside the Brooklyn campaign office of Adams, a former police captain who is running for the Democratic nomination for mayor.

�Dozens of volunteers and I were inside the office,� Adams� chief of staff, Ryan Lynch, tweeted. �This is the real public safety threat Eric keeps talking about. We must get serious about these guns.�

Early voting started Saturday for the June 22 primary. Adams is leading most recent polls with a message stressing his policing experience.

Police said no one was injured in the confrontation Sunday and there were no arrests.

(AP)