It’s no secret that Uber and Lyft don’t exactly like each other. But now the competition may be reaching excessive levels.

Using information from Lyft, CNN Money reports today that 177 Uber employees have ordered and then canceled 5,560 Lyft rides since last October. The purpose was to lower the amount of available Lyft drivers on the road, while also wasting the time of those drivers.

It’s unclear if Uber ordered the employees to cancel Lyft rides, or if the company even had knowledge of what was going on. But it’s not the first time Uber has been tied to sketchy marketing tactics. In January, Uber managers booked then canceled rides on Gett, a black car app based in New York City.

In response to the CNN Money story, Uber told Business Insider that it recently ran a program where thousands of drivers recruited drivers from other platforms and received referral credits. But the company did not directly address Lyft’s data or accusations.

Lyft and Uber have been locked in a price war ever since the two startups became immensley popular in the past few years. Lyft, which today began taking commissions again, has raised $333 million and is in just over 60 cities, while Uber has raised $1.5 billion and is in more than 100 cities worldwide.

Last week, both companies unveiled a new way for people to carpool with others who are riding on similar routes — UberPool and Lyft Line.