World Football - More Mexico players show clenbuterol traces
Four more Mexico players have been found with traces of the banned substance clenbuterol in their system, a senior FIFA official.
The four, however, have not failed doping tests. The latest news follows last month's suspension of five Mexico players for testing positive for clenbuterol.
FIFA's chief medical officer Jiri Dvorak said it was a surprise that so many players from the squad had contact with the same banned substance.
"We are talking about nine of 14 players," Dvorak told Mexico's Televisa television station.
Mexican Football Federation (FMF) president Justino Compean said he would not release the names of the four latest players found to have traces of clenbuterol.
"Any of us could have these traces (shown by the four players). They are nothing more than traces but these haven't reached a level which would be classified as doping," added Compean.
The FMF has said the five banned last month - goalkeeper Guillermo Ochoa, defenders Francisco Rodriguez and Edgar Duenas and midfielder duo Antonio Naelson 'Sinha' and Christian Bermudez - ate contaminated meat.