The Port Authority says the victims were slashed inside the main concourse at around 8:50 p.m. The 61 and 47-year-old men are both are in stable condition at Roosevelt Hospital. They were not stabbed.
The men got into an argument in the main concourse and one slashed the other two, believe to be with a box cutter or razor blade.
Police are looking for the suspect. Witnesses said he fled out the 9th Avenue exit. The suspect is described as a 5'6" man wearing a black hat, black pants and black sneakers.
A section of the South Wing has been evacuated as police investigate the slashing. Bus service in and out of the terminal is running with delays.
The streets around the bus terminal are extremely crowded because of the evacuation and the New Year's Eve street closures in Times Square.