A Northern Ireland peer is due in court charged with aggression against three members of the Spanish Civil Guard.
Lord Glentoran has not commented on the court appearance
It follows a row between Conservative NI spokesman Lord Glentoran and his wife, and customs officials at the Gibraltar border crossing.
The Civil Guard were called to calm the situation, but three officers were injured, central government said.
The couple were arrested and appeared before a judge. Lord Glentoran, 70, has not commented on the matter.
The couple are due to appear in court at La Linea.
A British embassy official in Madrid said: "I can confirm that Lord Glentoran was briefly detained and a court appearance is due."
A spokeswoman at the central government's regional office at Cadiz, which covers the town of La Linea, said: "There was an incident at customs on the crossing from Gibraltar.
"This couple became more aggressive and the Civil Guard were called by customs officers to calm them down. But it had the opposite effect.
"They became more aggressive and three officers were injured. The couple were arrested and handed over to the court."
Lord Glentoran, who served in the Grenadier Guards from 1954 to 1966, won an Olympic gold medal in the bobsleigh event and a world championship gold in the winter Olympics in 1965.
The same year he was awarded an MBE for services to sport and is still the president of the British Bobsleigh Association.
In 1983, he became the founder chairman of the Ulster Games Foundation in an attempt to bring international games to Northern Ireland.
In 1987, he was appointed chairman of the Northern Ireland Tall Ships Council, and brought the Cutty Sark Tall Ships Race to Belfast.
Between 1992 and 1996, he was chairman of Positively Belfast, which aimed to promote the city as a potential host for major events.
He became Conservative shadow minister for Northern Ireland in 1999, seven years after being awarded the CBE for services to Northern Ireland and industry.
He entered the House of Lords 10 years ago.