Germany's Foreign Minister Frank-Walter Steinmeier on Wednesday warned of the risk of a US-Russian conflict breaking out over Syria, as he readied to travel to the region.

Steinmeier -- who is to visit Iran, Saudi Arabia and Jordan in the coming days -- said he wanted to "urgently caution the US and Russia not to military engage in a way that in the end could lead to a conflict" between them.

"Secondly, we must strive to help build bridges between Iran and Saudi Arabia so that it becomes conceivable that in the end we can get all the regional partners we need at one table," he said. "For that I'll travel to Iran and Saudi Arabia next weekend."