The Gülenist Terror Organization (FETÖ), led by self-exiled figure Fetullah Gülen in the United States, might have staged the July 15 failed coup attempt, the United Kingdom's ambassador to Turkey has said, vowing to cooperate with Turkey against Gülen-affiliated institutions in the kingdom if evidence is provided.

Richard Moore, the ambassador of the U.K. to Ankara, replied to the questions of the Hürriyet Daily News in an interview.

"I guess we'll see more definitively as the legal process develops. But I don't have any difficulty in accepting what the government is saying; that Gülenists were involved in this coup. I think emerging evidence suggests that conclusion (i.e., some of the comments supposed to have been said by some of the arrested officers, the indication from the chief of General Staff that someone offered to put him on the phone to Fethullah Gülen). So, circumstantially, without prejudging the judicial process, it looks to me a pretty convincing case. But no doubt more will emerge in the coming weeks so I don't want to jump to conclusions" he said.

Turkey's government has repeatedly said the deadly coup attempt, which killed more than 230 people and injured nearly 2,200 others, was organized by U.S.-based figure Fetullah Gülen's followers and the Fetullah Terrorist Organization (FETO).

Gülen is also accused of running a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police, and judiciary, forming what is commonly known as the parallel state.