Football Soccer - Borussia Dortmund v AS Monaco - UEFA Champions League Quarter Final First Leg - Signal Iduna Park, Dortmund, Germany - 11/4/17 A Police motorcylce with the Borussia Dortmund team bus after an explosion near their hotel before the game Reuters / Kai Pfaffenbach Livepic

BERLIN (Reuters) - German investigators probing blasts that hit a bus carrying members of soccer club Borussia Dortmund are examining a second letter claiming responsibility for the attack that injured one player, Focus online magazine said on Wednesday.

It said a message posted on an anti-fascism online portal said the attack was in retaliation for what the letter called the soccer club’s soft approach toward neo-Nazi and racist fans.