If an investigation shows that last week’s attack on Saudi Arabian oil facilities was launched from Iranian territory, the kingdom would consider it an act of war, but Riyadh is currently seeking a peaceful resolution, a senior Saudi official said.“We hold Iran responsible because the missiles and the drones that were fired at Saudi Arabia…were Iranian-built and Iranian-delivered,” Minister of State for Foreign Affairs Adel al-Jubeir told CNN late on Saturday. “But to launch an attack from your territory, if that is the case, puts us in a different category… this would be considered an act of war.” Jubeir told reporters earlier that Riyadh was awaiting the results of a probe, which it has invited international investigators to join, into the September 14 strikes, which initially halved Saudi production, the largest-ever assault on oil facilities in the world’s top oil exporter. Riyadh has rejected a claim by Yemen’s Iran-aligned Houthi movement that it carried out the strikes. Washington has blamed Iran, which denies any involvement. “If they continue along this path, then they risk the possibility of military action,” Jubeir said of Tehran.