Irish health officials say they have found no evidence that former Russian Prime Minister Yegor Gaidar was poisoned or exposed to radiation.
Gaidar has been recovering in a Moscow hospital after becoming violently ill during a conference there last week.
His aides have said the illness may be related to the death of former Russian spy Alexander Litvinenko last week. Mr. Gaidar fell ill one day after Litvinenko died of suspected radiation poisoning.
Irish health authorities said Saturday that tests found no radiation in Mr. Gaidar or at sites he visited.
Earlier, Mr. Gaidar said he was feeling better as he recovers from the mysterious illness.
His aides said Irish doctors found the illness triggered radical changes to his vital functions, but they have not announced a cause.
Some information for this report provided by AP, Reuters and AFP.