Alphabet’s Waymo self-driving car unit is suing Uber Technologies and its autonomous trucking subsidiary Otto, alleging that the ride-share companies have stolen Alphabet’s sensor technology.

Waymo has accused Uber and Otto of stealing confidential information on Waymo’s Lidar sensor technology in order to help speed its own efforts in autonomous technology.

Uber said it is taking the allegations seriously and will review the matter carefully.

Lidar uses light pulses reflected off objects to gauge their position on or near the road and is a crucial component of autonomous driving systems.

The Lidar system is reportedly some 90 percent cheaper than other systems and Waymo says it is among the company’s most valuable assets.

Waymo is reported to be seeking a so-far-unspecified amount of damages and a court order aimed at preventing Uber from using its proprietary information.