Hamilton Police descended on an HSR bus Sunday afternoon, blocking off a lane of James Street South and arresting a passenger on board.

Multiple police cruisers responded just before 12:30 p.m. after reports of a disturbance on the city bus. The vehicle was stopped along James at Robinson Street, just south of the TD Bank and in the southbound lanes.

Upwards of six cruisers can be seen in a photo tweeted from the scene on social media.

"Everyone is fine," said Staff Sgt. Nancy Lantz. "We're just starting the investigation. There should be no disruption to any members of the public."

Police say traffic along James should not be affected this afternoon.

Lantz had no further immediate detail on the arrested person or what the cause of the disturbance was.

Happening now 20 cop cars to arrest 1 person off the bus #905 #hamilton #HamOnt #police #jamesstreetsouth pic.twitter.com/Dt7XhQ61Og

— Colin Marcano (@colinmarcano) September 18, 2016