A Moldovan athlete due to take part in the women\'s hammer at the London Olympics has been dropped from the squad after failing a dope test, officials said on Friday. Moldovan Olympics Committee chief Nikolai Zhuravsky told reporters that Marina Marghieva -- and discus thrower Natalia Artyk, who was not on the official list of 21 Moldovan athletes due to compete in London -- had been sidelined. \"Testing of their \'B\' samples confirmed the presence of banned drugs in their bodies,\" Zhuravsky said, adding that an investigation had been launched and both athletes risked a four-year ban.