Iran is working to tighten its defense relationship with Russia and to continue to supply it with advanced weaponry, Mossad chief David Barnea warned on Thursday.

Russia has made extensive use of Iranian drones in attacks against civilian targets in Ukraine in recent months.

“We warn against Iran’s future intentions, which they are trying to keep secret, to deepen and expand the supply of advanced weapons to Russia, to expand the uranium enrichment project and to intensify their attacks against friendly Muslim countries in the region,” Barnea said during a Hanukkah candle lighting ceremony at the President’s Residence in Jerusalem.

During the ceremony, Barnea and President Isaac Herzog presented citations to the Mossad’s top agents for various operations in the last year.

Mossad identifies dangerous Iranian attempts to carry out terrorist attacks

At the beginning of his speech, Barnea said that in recent months the intelligence agency has identified dangerous attempts by Iran to carry out terrorist attacks against Israel and other countries in the region.

“We are not surprised by the boldness of the Iranian regime. While one of its arms is sending Iranian diplomats to Vienna to negotiate an agreement with world powers, a second arm sends Iranian terrorists to kill innocent people around the world just because they are Israelis or Jews,” he said.