New video released in disturbing attack against 67-year-old man in Brooklyn

A new video was released Thursday of a disturbing attack against a 67-year-old man in East Flatbush on Monday. 
The incident happened on the corner of Albany Avenue and Glenwood Road, where a group of teens brutally beat a nearly 70-year-old man with a hammer following a confrontation that took place while the group was riding the bus. 
News 12 first reported the story Thursday night. 
The person who recorded the video from inside the bus tells News 12 the incident actually started when the teens were shooting a Nerf gun and the older man asked them to stop. 
Police tell News 12 no arrests have been made at this time. 
The investigation is ongoing.