German Chancellor Angela Merkel reacts as she attends the board meeting of Germany's Christian Democratic Union (CDU) in Berlin, Germany, June 18 2018. REUTERS/Hannibal Hanschke

BERLIN (Reuters) - Sentences handed down last week to members of a neo-Nazi gang were justified but the group’s killing spree was a very dark spot in German history and the punishments alone will not heal the wounds, Chancellor Angela Merkel said on Friday.