Police are investigating three homes in north metro Atlanta vandalized with swastikas to see if they are connected. Two homes in Dunwoody and one in Sandy Springs were spray painted Saturday night, police said. The Dunwoody homes, on Redfield Road and Coronation Drive, also were spray painted with vulgar language and images, including phallic symbols. The graffiti covered the mailboxes, grass, bushes, roadway, garages and vehicles parked in the driveways outside the two houses, Dunwoody Police spokesman Sgt. Mike Carlson said.