A man wearing a gas mask and tactical gear forced his way into a Boston-area courthouse on Monday and allegedly pepper-sprayed and physically assaulted several people before he was arrested.

A gas-mask-wearing assailant stormed into a Massachusetts courthouse Monday and unleashed a tirade, pepper-spraying officers and assaulting bystanders at random in a shocking, caught-on-camera attack.

A Massachusetts man wearing a gas mask and tactical gear was captured on video walking into a courthouse in a Boston suburb and attacking several people with pepper spray on Monday. Nicholas ...

A man wearing a gas mask was filmed as he stormed a courthouse ... The video then shows the intruder, wearing tactical gear, run through a metal detector amid chaotic scenes in the courthouse ...

The dramatic incident unfolded when a frightening figure, sporting a gas mask, a helmet, tactical boots and sunglasses, busted into Woburn District Court on Monday around 10:30 am. Later ...