Banned Russian athlete and 2012 Olympic 400-meter hurdles champion Natalya Antyukh is set to lose her gold medal from the London Games after the Athletics Integrity Unit (AIU) disqualified her results from July 2012 to June 2013 on Monday.

Antyukh, 41, won the title at the London Olympics in August 2012, beating American Lashinda Demus, who will be upgraded to the gold if the International Olympic Committee (IOC) acts on the AIU ruling.

"Following AIU charges based on LIMS data, Russian athlete Natalia Antyukh has been banned for the use of a Prohibited Substance/Method. DQ results from 15 July 2012 until 29 June 2013," the AIU said in a statement.