US officials say Iran is involved in drone attacks and other assaults on US military bases in Syria and Iraq.

Iran's state-run news agency reported that forces supported by Iran attacked US bases in Syria on Monday and disclosed footage of drones taking off.

Pentagon Press Secretary Pat Ryder confirmed to reporters on Monday that "there was an attempted drone attack" in Syria. He said the drones were taken down with no injuries to US forces, and that the attack was carried out by forces backed by Iran.

White House National Security Council spokesperson John Kirby also told reporters that there has been "an uptick in rocket and drone attacks by Iranian-backed proxy groups against military bases housing US personnel in Iraq and Syria."

Kirby said in some cases Iran is "actively facilitating" the attacks, and "spurring on others who may want to exploit the conflict for their own good or for that of Iran."

He said the US will not allow any threat to its interests in the region to go unchallenged. He added that the US message to any hostile actor seeking to escalate or widen the impact of the Israel-Hamas conflict is to not do it.