The Washington Post's story cited unnamed U.S. intelligence officials as saying newly-analysed information confirmed that on 23 May senior members of the UAE government had discussed a plan to hack Qatari state media sites.
The Post says the UAE planted a false story that sparked the current crisis between Qatar and several Arab countries.
In early July, the Arab states sent a list of demand and required Doha to cut diplomatic relations with Iran, close the Turkish military base, eliminate Al-Jazeera TV channel, extradite all persons wanted in four countries on charges of terrorism and pay compensation.
A senior UAE official said global monitoring was needed in the standoff between Qatar and its Arab neighbours, adding he saw signs that the pressure exerted on Doha "was working".
This is a developing story; keep an eye on this space for latest news. Qatari government spokesperson Sheikh Saif Bin Ahmed Al-Thani said at the time the postings were false and the result of a hack by an "unknown entity". However, the remarks were reported across the region and caused a stir.
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The report quotes unnamed USA intelligence officials as saying that senior members of the Emirati government discussed the plan on May 23. For the record, the UAE ambassador and foreign minister have denied the report, but they would have to. He also called for the creation of an worldwide monitoring group to ensure that Qatar refrains from supporting terrorism.
The four countries, accusing Doha of supporting "extremism and terrorism", meddling in their internal affairs and cosying up to their rival Iran, have also imposed a sweeping air, sea and land blockade.
The Federal Bureau of Investigation was previously known to be working with Qatar to probe the hacking.
"What we really do want is we either reach an agreement and Qatar's behaviour changes, or Qatar makes its own bed and they can move on and we can move with a new relationship".