BOSTON — Boston authorities say they are disturbed by an assault on an MBTA bus driver by more than a dozen youths.

Transit police Superintendent Joseph O’Connor said Sunday that a woman threw her pass at the driver on Saturday morning.

Then perhaps as many as 20 teenage boys stood in front of the bus, preventing it from moving, while some boarded and punched the 53-year-old driver, while others tried to pull the driver through the window.

O’Connor says it’s unclear whether the fare dispute was related to the attack.

The male driver hit an alarm, scattering the youths.

The driver required treatment for minor injuries.

There have been no arrests and police are asking the public for information.

Only subscribers are eligible to post comments. Please subscribe or to participate in the conversation. Here’s why.

Use the form below to reset your password. When you've submitted your account email, we will send an email with a reset code.