The US is concerned Russia may supply missiles to the Houthis in Yemen, an American official said, a move that could stoke further Middle East unrest by strengthening one of the militant groups fighting Israel.

DUBAI, United Arab Emirates (AP) — Yemen’s Houthi rebels claimed Monday they shot down another American-made MQ-9 Reaper drone over the country, with videos purportedly showing a surface-to-air missile striking it. The U.S. military did not immediately acknowledge losing any aircraft.

The strikes in Yemen attacked Ras Issa and the port city of Hodeidah, the Israeli military said. The Houthi rebel group said Israel targetted fuel tanks and two power stations.