Swiss police have detained a man in connection with a gun used by a German neo-Nazi group suspected of killing 10 people.
Bern cantonal (state) police say the unidentified Swiss man was arrested Tuesday upon arrival at Zurich airport.
Police spokesman Michael Fichter said Friday that the man was ordered kept in custody to prevent collusion while investigations continue.
He is the second person arrested in Switzerland by police trying to trace the origins of a modified Ceska pistol found at the neo-Nazi group's burned-out apartment in the German town of Zwickau.
Police detained another Swiss man Jan. 20 on suspicion of "supporting a criminal organization."
Swiss police say neither of the men appeared to have direct links to rightist groups.