Washington (CNN) A day after Secretary of State Mike Pompeo blamed Iran for the attack on Saudi oil facilities and argued there is "no evidence the attacks came from Yemen," a senior administration official briefed CNN on information to back up Pompeo's claims.

The official pointed to the angle at which Saudi oil facilities were attacked, the numbers of points of impact and other information to argue that it is unlikely the attacks were carried out by Yemen. Instead, the official suggested the attack most likely originated in Iran or Iraq.

"It is very difficult to see how these things could have come from anywhere but Iran or Iraq," the senior administration official said.

The official said 19 Saudi targets were struck in Saturday's attack and argued that such an attack could not be carried out with 10 drones, which the Houthis claimed to have used.

"You can't hit 19 targets with 10 drones like that," the official said.

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