Spanish police said they had arrested a Qatari athlete as part of an ongoing investigation into drug trafficking that has already seen one of the world's top coaches taken into custody.
Media reported that the man arrested was Sudanese-born Qatari runner Musaeb Abdulrahman Balla, the two-time defending Asian 800m champion who finished sixth at last year's world championships in Beijing and fifth at the world indoors in Portland earlier this season.
"A Qatari athlete was arrested," Catalonian police said, without naming him.
The arrest is the third after police took Somali track coach Jama Aden, whose Ethiopian protege Genzebe Dibaba is the current world 1500m champion, and a physiotherapist into custody on Monday, both charged with having administered athletes with banned substances.
Aden was picked up in a dawn raid at a hotel in the Catalonian town of Sabadell occupied by a group of athletes coached by the ex-Olympian.
OmRiyadat - APF