Uber Technologies Inc. has sold its stake in long-time partner Serve Robotics Inc., signaling a fracture in their alliance over the deployment of delivery robots. The divestment marks the latest setback in Uber’s broader push to integrate autonomous services into its platform, as the two companies clashed on strategy and operational focus.

According to Bloomberg Markets, the split underscores the challenges Uber faces in scaling robotic delivery while maintaining control over its marketplace. Serve Robotics, which had relied on Uber’s network for orders and funding, now faces an uncertain future as it seeks new partners.

Industry analysts note that the unraveling of this partnership could slow the adoption of sidewalk delivery robots in urban areas, where Uber had hoped to leverage the technology to reduce costs and increase efficiency. The move also comes as Uber refocuses on core ride-hailing and food delivery businesses, potentially deprioritizing long-term autonomy investments.

Neither company has publicly commented on the specifics of the split, but sources indicate disagreements over robot deployment timelines and revenue sharing were key factors. The divestiture leaves Serve Robotics without a major backer as it competes against larger players like Nuro and Amazon Scout.