Rheinmetall is scaling back its one-year-old partnership with US defense startup Anduril Industries, Bloomberg News reports. The collaboration focused on developing autonomous drones and advanced defense systems.

The move marks a potential setback for the German defense giant's expansion into the unmanned military systems market. Rheinmetall originally intended the deal to integrate Silicon Valley technology into its product portfolio.

Neither company has publicly detailed the reasons for the change. Both Rheinmetall and Anduril declined to provide immediate official comments on the future of the collaboration.