Finnish ski jumping star Matti Nykanen and his wife have been detained on suspicion of attempted murder.
Ski jumper Matti Nykanen was known as the Flying Finn
Mr Nykanen, 41, is accused of stabbing a 59-year-old man at a cottage near Nokia in southern Finland.
The alleged victim, said to be an acquaintance of the couple, has not been identified and his injuries are not thought to be life-threatening.
Police spokesman Pasi Nieminen said Mr Nykanen and the stabbed man were under the influence of alcohol at the time.
Mr Nykanen's skiing achievements included gold and silver medals at the 1984 Sarajevo Olympics aged 21.
One of a number of Finnish sporting heroes known as the Flying Finn, Mr Nykanen's Olympic total before quitting the competition circuit a decade ago was four golds and two silver medals.
In the years since, he has courted controversy with reports of alcohol abuse and
careers as a musical performer and as a male stripper.