Subscribe | UPI Odd Newsletter Subscribe PROVIDENCE, R.I., March 21 (UPI) -- Police in Rhode Island said they are investigating after pictures were posted online of two women "planking" on a police van. Providence police said an internal investigation was opened after photos appeared on Facebook of two women "planking," a posing trend involving a person lying on their stomach with their bodies rigid like a wooden plank, on a city police van, WPRI-TV, Providence, reported Wednesday. Advertisement "The incident took place several months ago. The officers operating the police van identified themselves and the administration will take necessary action," police spokesman Steven Pare said. A witness said the women were drunk and one of them appeared to fall off the van while taking the pictures.