Spanish police say Atletico Madrid's trainer was detained and has been released after being accused of violence against women.
Oscar Ortega was taken into custody late Monday and released after appearing before a judge on Tuesday. He was not immediately charged with any crime.
The case will be heard by a court that handles violence against women.
No other details were immediately released.
Atletico Madrid say they will not consider taking any action until all details are available.
The 60-year-old Uruguayan was Atletico's trainer when coach Diego Simeone played for the club in 2004. He returned as a member of Simeone's staff when the Argentine took over as coach at the end of 2011.