The Pentagon is looking at how to help Ukraine defend itself against the Iranian drones Russia is using to kill civilians and destroy infrastructure, White House spokesman John Kirby said Thursday.

“I can’t tell you today what that’s going to look like, when we’re going to be able to move additional air defense capabilities to Ukraine,” he said. “But I can assure you that (the Defense Department) is well aware of the threat and is working hard to see what they can do to help the Ukrainians deal with the threat.”

That includes working with allies with air defense capabilities that might be able to help, Kirby added.

Although Russia and Iran deny it, Kirby said Russia has received dozens of drones from Iran and will likely get more. Iran has also put a “relatively small numbers” of trainers and tech support in Crimea to show Russians how to use them, he said.

“Tehran is now directly engaged on the ground, and through the provision of weapons that are impacting civilians, and civilian infrastructure in Ukraine,” he said. “But the bottom line is, we don’t believe it’s going to change the course of the war.”

GRAPHICS:Mapping and tracking Russia’s invasion of Ukraine

Other developments:

►Overnight attacks from Russian drones and missiles killed at least three civilians and wounded 14 across Ukraine, the president’s office said, adding that a school in the Zaporizhzhia province was struck early Thursday.

►A Russian fighter jet “released a missile” near an unarmed British aircraft in “international airspace” over the Black Sea, U.K. Defense Secretary Ben Wallace said Thursday. Wallace said Russia blamed the “potentially dangerous” missile release on a “technical malfunction.” He said he does not consider the incident a deliberate escalation by Russia.

►Russian President Vladimir Putin’s declaration of martial law in four illegally annexed regions of Ukraine – a move denounced internationally – “speaks to his desperation” as Ukrainian forces make continued progress, Secretary of State Antony Blinken said in an interview with ABC’s “Good Morning America” released Wednesday.