Two Nigerian students have been arrested for allegedly assaulting a salesman of a medical store here, police said on Thursday. “Two Nigerians have been arrested last night and today sent to jail. They had beaten a medical store salesman. They are students at a Greater Noida college,” Kasna Police Station incharge Sudhir Tyagi said. The scuffle between the accused and the salesman broke out over the mode of payment for a cough syrup.