One of seven teens accused of beating and slashing two men aboard a Staten Island bus packed with riders has been arrested, police said.

The teens ganged up on the men aboard a S74 bus Wednesday night.

Jacquille Pender, 17, of Staten Island, was arrested a short time later, cops said.

The Staten Island District Attorney’s Office said Pender was arraigned yesterday on two counts of assault and criminal possession of a weapon.

It was not immediately clear if he had a lawyer.