 Israel likely behind drone strike in Iran, says U.S. official. Israel appears to have been behind drone attacks on Iran's military factory and unnamed U.S. official told Wall Street Journal on Sunday. Iran revealed on Sunday that it intercepted drones targeting a military factory in Central Esfahan city, adding that there were no casualties or serious damage to the facility. The extent of the damage has not been clarified yet. Another U.S. official told Reuters on the condition of anonymity that it appears that Israel was involved in the drone strike on Esfahan. Israel has refused to comment on the incident. Earlier Iranian lawmaker Hussain Mirzai said there was strong speculation that Israel was behind the drone strike on the facility, while Iran's defense ministry did not comment on who carried out the attack. The ministry said three drones were launched at the facility, with two of them successfully shot down. Meanwhile, Iranian state media reported fire at an oil refinery near the northwestern seat of Tabriz on Sunday, without revealing the cause of the fire. It's yet to be clarified whether there are any links between the two incidents.