Multiple witness UFO sightings are fairly unusual, and this one must have been quite noticeable to have attracted so many witnesses. Unfortunately, the photo that was taken is not good, but there is no reason to doubt the accounts. Silver cylinders are a relatively common UFO type.
Story Source:
http://www.mercedsunstar.com/2012/04/16/2310749/dozens-spot-unidentified-flying.html