SINGAPORE >> Singapore police say they are investigating reports of a man who allegedly cheated and overcharged unsuspecting passengers while posing as a driver for mobile app-based transportation company Uber.

In accounts posted to Facebook, several people said a man in a Honda Airwave station wagon claiming to be an Uber driver picked them up on the roadside and charged two or three times the normal rate.

One man recounted a March 1 incident on his Facebook page by saying the meter jumped $29 in just three minutes, and that the total fare came to $71, far higher than it should be. He said the driver then asked for cash payment and did not provide a receipt.

Comments on the post claimed other victims who took rides from the same vehicle were charged up to $102 for rides that would otherwise cost about a third of the amount.

Uber Singapore confirmed Monday that the driver’s vehicle was not registered with them, and said it filed reports against him to the police.

The U.S.-headquartered company only allows its registered drivers to accept bookings made through its app, and payments are cashless.

The Land Transport Authority said in a statement it had impounded the man’s vehicle and was investigating the case.

A police spokesman or woman told The Associated Press on Wednesday that a 29-year-old man was assisting its investigations, although the police official didn’t confirm that the man was indeed the suspected driver.