U.S. officials say the Iranians fired a missile at a U.S. drone that was sent to investigate a distress signal sent by the MV Altair tanker in the Gulf of Oman. The missile was reportedly fired from Iran's mainland and missed the unmanned MQ9 Reaper drone.
The drone reached the site just eight minutes after receiving the distress call and reportedly recording footage of Iranian vessels closing in the tankers prior to the attack.
U.S. officials have blamed Iran for the attack.
"This assessment is based on intelligence, the weapons used, the level of expertise needed to execute the operation, recent similar Iranian attacks on shipping, and the fact that no proxy group operating in the area has the resources and proficiency to act with such a high degree of sophistication," Secretary of State Mike Pompeo said.
Iranian officials have denied any involvement in the attack.
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