Hundreds of people have attended a rally in front of the centre-right CDU party's headquarters in Berlin in protest against the passing of a stricter migration policy which would seek to turn back many more migrants at Germany's borders.

Friedrich Merz, the frontrunner to become chancellor in February's election, is making waves by agreeing to work with the far-right AfD on immigration rules.

With less than four weeks before Germany’s federal election, Chancellor Olaf Scholz and his conservative challenger Friedrich Merz, who is leading polls, will take their contentious battle over how to crack down on illegal migration to parliament.