The Amboli police arrested film music director Ismail Darbar's son along with his two associates in a case on Tuesday where they had assaulted an assistant director.The accused had assaulted the victim over a payment dispute, said the police. The police is probing if the victim worked with Darbar regarding the payment dispute. The incident took place on Monday night and Ismail Darbar was not involved in the incident said the police.The police booked Darbar's son Jayed, his friends Nishant Singh and Mohsin Khan under Indian Penal Code section 323, 324, 504 and 506. The victim, Prashant Chaudhary, lives at Evershine building at Jogeshwari (West).The accused went to meet the victim and called him to the parking area of the building to discuss the payment issue. There was an argument between them after which the accused allegedly assaulted Chaudhary with a hockey stick.