Heras blames "Lab error" for test result

Roberto Heras counts his victories at the start of the final stage of the 2005 Vuelta

Roberto Heras counts his victories at the start of the final stage of the 2005 Vuelta (Image credit: AFP)

Roberto Heras has proclaimed his innocence of drug use after being suspended by his team following an A-sample test at the Vuelta a Espana that was non-negative for EPO.