Friedrich Merz, the front-runner to become Germany’s next chancellor, relied on votes from the far-right AfD to push an anti-migration motion through parliament.

Former German Chancellor Angela Merkel has issued rare public criticism of her successor as the country’s center-right leader, the front-runner in Germany’s election next month, for putting to parliament proposals for tough new migration rules that only passed with the help of a far-right party.

The former chancellor's comments come after the CDU put forward a proposal which was supported by the far-right AfD.

Friedrich Merz, the leader of Germany's CDU/CSU conservative bloc which is leading polls ahead of the Feb. 23 vote, is keen to seize the initiative on migration policy, which has shifted sharply back into focus after an Afghan asylum seeker was arrested over deadly stabbings last week.

The CDU party chief, who leads in the polls to become the next chancellor, said he would collect votes from all parties to push his five-point migration plan through parliament despite Chancellor Olaf Scholz's strong opposition.

Former German Chancellor Angela Merkel criticised the leader of her Christian Democrats (CDU), Friedrich Merz, for drawing on support from the far-right to pass a motion in parliament, in a statement on Thursday.

Former German chancellor Angela Merkel on Thursday criticized her opposition centre-right Christian Democrats (CDU) for passing a motion in parliament for hard-line reforms to migration policy with votes from the far-right Alternative for Germany (AfD).