German Chancellor Olaf Scholz said in a statement on Wednesday that he had spoken with Polish President Andrzej Duda and expressed his condolences to him and his citizens after blasts near Poland's border with Ukraine.
"This is a terrible incident and it is necessary to carefully clarify how it came about," he said, according to the statement.
Poland has called the blasts a strike by a Russian-made projectile, while Russia has denied the claim.
(Reporting by Andreas Rinke in Berlin; Writing by Kanupriya Kapoor; Editing by Ed Davies)