The first incident happened at 10:00 a.m. Monday near St. Katharine of Sienna School at 104 S. Aberdeen Avenue.
It was around 10:00 a.m. when police say a 10-year-old student reported seeing a white van near the school parking lot.
The van, described possibly as a Ford Econoline, had a large dent down low in the middle of the passenger side as well as steel bars on the interior of the rear windows, the student said.
The school yard was full of children out for recess when, according to the child, the man started taking pictures of the children with a smart phone.
The van was parked for about one minute before driving away.
The man is described as a white male in his mid-20s with light-brown spiked hair and wearing black square sunglasses and a white sleeveless shirt.
Then, at 8:30 a.m. Thursday, police say a 7-year-old reported seeing a light blue work van across the street from the same school yard.
The child said there was a man in the driver's seat wearing a black ski mask and staring at the children.
The 7-year-old said the man had light brown skin around his eyes and may have been Hispanic.
Anyone with information regarding these or similar incidents is asked to contact Radnor Police at 610-688-0503.