DUBAI/BEIRUT, May 20 (Reuters) President Hassan Rouhani is leading the vote count in Iran's presidential election, interior ministry official Ali Asghar Ahmadi told reporters today. With 25 million ballots from yesterday's election certified by the authorities so far, the pragmatist Rouhani won 14.619 million and his hardline conservative challenger Ebrahim Raisi gained 10.125 million, Ahmadi said in a briefing broadcast live on television. He added that the final results would be announced later today. REUTERS SDR 1005