Saudi Arabia's Defense Ministry has shown debris of drones and cruise missiles, saying these are evidence of Iran's involvement in the attack on its two oil installations.
The ministry says that 18 drones and seven cruise missiles used in the attack came from the same direction and this suggests that they cannot be Yemen's source.
Iran-backed Houthi rebels in Yemen had previously claimed responsibility for the attack.
Iran has denied allegations of being involved in any way and warned that it will respond to any military action.
But the Saudi Arabian Defense Ministry says the wreckage shows that 'these attacks were without doubt sponsored by Iran'.
However, the Ministry did not say from where these weapons were launched.
US President Donald Trump said earlier on Wednesday that he had asked for tougher US sanctions on Iran.
US Secretary of State Mike Pompeo is in Saudi Arabia on Wednesday and is scheduled to meet King Salman's son Crown Prince Mohammed bin Salman.
Spokesperson Colonel Turki al-Malki said that exact information is being sought from where these drones were launched.
"The data recovered from UAV computers shows that it is from Iran," he said.
He said 18 UAVs (drones) were fired at the Bukit oil establishment and seven cruise missiles were fired at both the installations. Four of them fell in the Khoras oil field and three others fell near Bukki.
Malki said that all these missiles were fired from the northern direction. He showed a video of a UAV fired on the back. In addition they showed the map and pictures of the loss.
He said of the attack on Khuras that the exact impact of the cruise missiles reflected Iran's advanced capability beyond its visible capability.
He called these attacks an attack on the international community. He demanded that those responsible be held accountable for their actions.
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