Vancouver police have issuedwarning to parents about a man who has been seen exposing himselfto young girls on thegrounds of a city elementary schoolthree times in the past few weeks.

The man was first observed by twogirls at Quilchena Elementary School in the 5300 block of Maple Street on Good Friday, April 6.

The following afternoon, two other young girls spotted what appeared to be the same man undressing on the school grounds.

He was seen again at the school on Saturday, April 21.

The man is described by the children as a white male, 30 to 40 years old, five feet eight inches tall with a thin build.

He has short brown hair and black round-framed glasses.

He was wearing different clothes on different occasions, and was carrying a black backpack and a shopping bag.