RUSSIA will be barred from the World Championships in London in August after failing to convince the International Association of Athletics Federations that it is ready to return following allegations of state-sponsored doping.

The IAAF voted unanimously to extend the current ban on the Russian Athletics Federation from senior international competition, although Russians can still apply to compete as individual athletes.

Chairman of the IAAF Taskforce, Rune Andersen, said it was "not recommended" for the ban to be lifted before the Russian anti-doping agency, RUSADA, is fully code-compliant with the World Anti-Doping Agency, which will not happen until November.

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Andersen said: "The road map that I outlined . . . clearly states there will be no reinstatement until RUSADA is functioning. And presumably if everything goes to plan there will be a full reinstatement by November 2017.

"This meant Russia as a nation, or RUSAF, is not recommended by us to be reinstated before that time."

The IAAF said that it has currently had applications from 35 individual Russian athletes to compete as international athletes.

The task force made it clear there are still some issues for Russia to address, including adequate sanctioning of banned athletes and a response to the McLaren reports which revealed doping improprieties.

Andersen added: "While acknowledging several positive developments at its recent meetings in Moscow last month... the Taskforce pointed to some negative developments since its last report to Council in December.

"These have included some unhelpful public comments recently made by some Russian sporting officials."

Meanwhile the IAAF also announced a freeze on all new transfers of allegiance, with IAAF president Lord Coe saying rules which effectively allow athletes to switch nationality to the highest bidder are "no longer fit for purpose".

Coe said a working group would be set up to study proposals for new rules relating to changes in nationality, and that the announcement would not affect the 15 applications currently being processed.