"We have no independent confirmation from our end," Dujarric said. "We are not involved first hand in any of the military or security operations. I don't have any information besides what we've read in the media."
Earlier in the day, the Russian Defense Ministry said that it was verifying information that IS leader Abu Bakr al-Baghdadi could have been killed in a Russian Aerospace Forces strike, carried out on May 28.
The ministry released a photo demonstrating the results of the Russia's Aerospace Forces' airstrike conducted on May 28 against Daesh headquarters.
A photo dated May 13 shows four buildings of Daesh headquarters. However, the photo dated May 28 shows that the buildings hit by the Russian airstrike have been completely destroyed.