The conservative CDU/CSU bloc emerged as the winner of Sunday's parliamentary elections in Germany, securing 28.6% of the vote, the dpa agency reported, citing preliminary official data released overnight from Sunday to Monday by the Federal Election Commission.

CDU/CSU secured 28.6 percent of the vote, followed by the Alternative for Germany (AfD) with 20.8 percent and the Social Democratic Party (SPD) with 16.4 percent, according to the preliminary results released by the Federal Returning Officer in the early hours of Monday.

Germany's centre-right CDU/CSU bloc has won national elections by a large margin, with all constituencies counted, paving the way for leader Friedrich Merz to be the next chancellor, as could be seen on the website of the federal returning officer.