The Latest from the IAAF investigation (all time local):

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10:25 a.m.

President Vladimir Putin's spokesman says the accusations of state-sponsored doping in Russian track and field appear unfounded.

Dmitry Peskov told journalists on Tuesday that whenever any charges are made, they must be based on some evidence.

He says "as long as there is no evidence, it is difficult to consider the accusations, which appear rather unfounded."