MOSCOW, April 22 (AFP) - Russia is concerned that Iran may be enriching uranium with a view to developing nuclear weapons, Atomic Energy Minister Alexander Rumyantsev said on Tuesday, quoted by the ITAR-TASS news agency. Rumyantsev referred to US press reports that Tehran had equipped a nuclear complex with the capacity to enrich its recently-disclosed uranium deposits, sparking fears that the country may be stepping up a covert weapons program. "Such centrifuges are capable of enriching uranium to a high enough concentration for developing weapons," he said. "If the media reports are accurate, the situation is alarming." "Iran must acknowledge...