Four more Mexico players have traces of banned substance

MEXICO CITY, July 1 (Reuters) - Four more Mexicoplayers have been found with traces of the banned substanceclenbuterol in their system, a senior official with soccer'sgoverning body FIFA said on Friday.

The four, however, have not failed doping tests. The latestnews follows last month's suspension of five Mexico players fortesting positive for clenbuterol.

FIFA's chief medical officer Jiri Dvorak said it was asurprise that so many players from the squad had contact withthe same banned substance.

"We are talking about nine of 14 players," Dvorak toldMexico's Televisa television station.

Mexican Football Federation (FMF) president Justino Compeansaid he would not release the names of the four latest playersfound to have traces of clenbuterol.

"Any of us could have these traces (shown by the fourplayers). They are nothing more than traces but these haven'treached a level which would be classified as doping," addedCompean.   

The FMF has said the five banned last month -- goalkeeperGuillermo Ochoa, defenders Francisco Rodriguez and Edgar Duenasand midfielder duo Antonio Naelson 'Sinha' and ChristianBermudez -- ate contaminated meat.