Scottish Football Association acting chief executive George Peat has described Tuesday night's jeering of the Liechtenstein national anthem as "disgraceful'' and issued a public apology.
The Liechtenstein anthem, which has the same tune as God Save The Queen, was met with audible derision by some members of the Scotland support ahead of the match at Hampden Park, which Craig Levein's men won 2-1 courtesy of Stephen McManus' 97th-minute header.
Peat said: "I was embarrassed and extremely disappointed by the disgraceful behaviour of some of our supporters during the Liechtenstein national anthem at Hampden Park last night.
"The Scotland fans have worked hard to earn their reputation throughout the world as fun-loving and respectful followers of football. Last night, those who chose to boo our opponents' anthem only served to tarnish that reputation.
"I apologise unreservedly to our visitors for the crass reaction to their anthem, just as I did in private last night to the Liechtenstein delegation.
"It must not be forgotten that all nations must abide by FIFA's Fair Play policy and last night's behaviour does nothing to help Scotland's image.''