(KRON) -- Two people were arrested after a mixture of ATV and dirt bike riders took over the Bay Bridge early Sunday evening, according to California Highway Patrol Public Information Officer Mark Andrews. The incident caused a traffic jam and lane closures on the bridge. Approximately 50 to 60 su spects were riding either an ATV or a dirt bike, Andrews said. They first made their way into San Francisco from Oakland. Once they arrived in San Francisco, Andrews said they spent around 45 minutes to an hour there. The number of ATV and dirt bike riders was upgraded to 70, according to the Oakland Police Department, the agency that made the arrests. The riders then made their way back onto the eastbound lanes of the bridge, according to CHP. As they were heading towards Oakland, all eastbound traffic was stopped. The group ditched their bikes. Viewer video of the ATV and dirt bike riders taking over the Bay Bridge can be seen in the media player above. Seven injured after car plows through crowd near Oakland First Fridays event Photo: Oakland Police DepartmentPhoto: Oakland Police DepartmentPhoto: Oakland Police Department Photo of the dirt bikes and ATVs confiscated after Sunday evening's sideshow on the Bay Bridge. The suspects tried to run away, but two of them were arrested by Oakland Police Department officers, according to Andrews. Eastbound lanes 3, 4 and 5 were temporarily closed before reopening around 7:15 p.m. The dirt bikes and ATVs were then confiscated by the authorities (see photo above). The vehicles were taken and put on a Caltrans tow truck. The San Francisco Police Department, Oakland Police Department and CHP assisted in the response. If you have video of the ATV and dirt bikes on the Bay Bridge, submit it on KRON4's Report It! page. This is a developing story. Check back for updates. ...read more read less