Bolton Wanderers' Spanish left back Marcos Alonso has been detained for questioning in Madrid after a car he was driving while allegedly under the influence of alcohol was involved in a deadly car accident, Spanish media reported on Monday.
The 20-year-old was at the wheel of the car which flew off a Madrid road early on Monday and hit a wall, causing the death of one of the vehicle's passengers, a young woman who suffered serious brain injuries, the online edition of daily newspaper El Pais reported.
Alonso was found to have a blood-alcohol level of 0.45, above the legal limit of 0.25, the newspaper added. He refused to take a second test, claiming he was suffering an anxiety attack, according to the paper.
The player suffered light injuries in the accident while the three other passengers in the car are reported to have suffered serious injuries.
He may now be accused of negligent homicide.
Bolton signed Alonso, whose father and grandfather were professional footballers, from Real Madrid in July 2010 on a three-year deal.
Alonso's grandfather played for Real in the 1950s and 60s and his father spent five years at Barcelona in the 1980s.