"At least 500 stolen cars and motor-bikes ave sneaked into Nepal where they are plying under fake number plates," said Ghimire at the Rupaidiha Nepalganj border.
However, police were unable to get hold of those riding the vehicles as they managed to flee.
"We have also been asked to carry out checks in plain clothes so that the thieves do not get alerted and can be nabbed," Ghimire said.