BROOKLYN - A trail of glass on a Midwood street is serving as a warning for drivers to be on the lookout for vandals. 

According to a News 12 viewer, someone smashed in the windows of at least four cars overnight, including his own, while they were parked one behind the other on East 9th Street, between Avenues S and T. 

The viewer, who wants to remain anonymous, sent in photos of the damage. He says nothing was stolen from inside his vehicle, but he doesn't know about his neighbors. 

News 12 reached out to police, but they had not yet been made aware of the vandalism.