German Chancellor Angela Merkel (Photo: AFP/TTXVN )

Meanwhile, Germany's Social Democratic Party (SPD) leader Martin Schulz denied an earlier report that his party was ready to start grand coalition talks with German Chancellor Angela Merkel's Conservatives Union, but kept the options open. The SPD executive will debate all options, a minority government or a grand coalition again with the Union. A resolution should then be formed at the party congress in the coming week.

German daily Bild reported earlier on Friday that SPD and the Union, comprised of Merkel's Christian Democratic Union (CDU) has agreed to enter exploratory talks for a renewed coalition talks after the one since the 2013 federal elections.