The Bethlehem Area School District is asking parents to review safety precautions with their children following a series of suspicious vehicle sightings near bus stops in Bethlehem Township.
The latest incident involved a dark green van, seen Friday morning near the Freemansburg Avenue and Washington Street bus stop.
In a message posted on its website, the district says township police will increase patrols in the area.
"If you or your child witness any suspicious activity please notify your local police department immediately," the message reads. "Also please review safety precautions with your children."
The dark green van was the third suspicious vehicle reported near a bus stop in a little over a week.
On Sept. 12, police say a man in an older brown Kia motioned to two students as they got off their bus at Washington Street and Sculac Drive.
According to police, the students ignored the man and walked on. The bus driver tried to get his license plate number, but couldn't see it. Police say the man may have been driving a car without a plate.
The man was older, white, and had grey facial hair, police said. It was unclear whether the two incidents were connected.
And on Sept. 16, a man in a pick-up truck was seen twice driving slowly past a bus stop at Reeve Drive and Rexford Drive Monday morning. Police say the man drove a tan or grey truck, and was white, with facial hair.