Surveillance video shows a group of teens attacking an on-duty Bee-Line bus driver, punching and kicking him as he tries in vain to defend himself.

Police say it happened as a group of four young men was exiting a B60 bus Saturday in Eastchester. 

Police say the suspects are between 16 and 19 years old. Anyone who recognizes them is asked to call Crime Stoppers at 1-800-577-TIPS.

The Transport Workers Union says MTA buses have been outfitted with partitions that are supposed to protect drivers. But Westchester County Executive Rob Astorino denied a request for similar shields on the Bee-Line buses, according to the union.

Transport Workers Union Local 100 President Tony Utano responded to the incident in a statement saying, "This attack is absolutely unacceptable, and we urge anyone who recognizes these individuals to contact the police. This attack vividly highlights why Liberty Lines buses need protective partitions installed."

TWU Local 100 says it is renewing its push for partitions on those buses.