A 16-year-old boy was slashed inside a Manhattan high school Tuesday afternoon, authorities said. 

The teen was cut once in the chest with a knife around noon inside Manhattan Business Academy — housed within the Bayard Rustin Educational Complex on West 18th Street near Ninth Avenue in Chelsea, cops and police sources said. 

Two suspects are being sought, one of whom is a 17-year-old boy, the sources said. 

The victim was taken to Bellevue Hospital with non-life-threatening injuries, police said. Authorities could not officially confirm he is a student at the school

Information on the second suspect was not immediately known.

An 11th grade student named Isrrael who attends Hudson High School of Learning Technologies — also housed in the same building — said he saw the victim sitting shirtless in a wheelchair inside the school as EMTs attended to him.

“The kid was in a wheelchair,” Isrrael said. “He had his shirt off.”

“They didn’t lock the school down. Our teacher just kept us in for a few minutes while they took him out and then we were allowed to leave.”

Additional reporting by Tina Moore