The US does not have enough missiles to return to an all-out war with Iran, an American official has warned.

Donald Trump is reportedly looking at planning for a “wider war” against Tehran with the American military sending more warplanes to the Middle East.

However, a US official familiar with administration discussions said the operation would be limited by dwindling stockpiles of air defence and long-range munitions.

“We do not have enough to safely sustain operations, and I don’t think the White House is aware of that,” the official told The Washington Post.

The warning comes as the US launched a ninth consecutive night of attacks on the country, edging closer to all-out conflict in the region.

The latest barrage of strikes over the weekend was meant to “punish” Tehran for the suspected deaths of three American soldiers during the Iranian bombing of a US air base in Jordan.

Mr Trump said the US had “hit them [Iran] very hard again” on Sunday night in “honour of” the “three great patriots” who died.

“Iran has been very, very badly damaged. They’ve lost everything almost militarily. They’ve got very little left,” the US president told reporters on his return from the World Cup.

Two American soldiers were killed, and a third was feared dead, after an Iranian missile-and-drone strike on Muwaffaq Salti Air Base in Jordan on Friday.

US Central Command (Centcom) announced on Sunday night that human remains had been located at the air base. Officials were yet to verify whether the remains belonged to the third soldier, however Mr Trump later said the death toll was “probably” up to three.

Another American soldier died on Saturday during what was described by Centcom as “a controlled detonation of unexploded ordnance from a downed Iranian one-way attack drone” in northern Iraq.