Two female Ukrainian sprinters due to compete at the world athletics championships have been provisionally suspended due to doping violations, the Athletics Integrity Unit (AIU) has announced.
Olesya Povkh and Olha Zemlyak were suspended "for the use of a prohibited substance", the AIU said in a statement. The two will remain suspended until the outcome of the case.
Povkh, 29, was due to run in the women's 100 metres and the 4x100m relay event in which she won bronze at the London Olympics in 2012.
Zemlyak, 27, was due to run in the women's 400m, in which she was a European silver medallist in 2014, and the 4x400m relay.
The championships start in London on Friday and continue until August 13.
