Twenty-five people have been arrested in raids across Germany on suspicion of plotting to overthrow the government.

The group of far-right and ex-military figures are said to have prepared for a “Day X” to storm the Reichstag parliament building and seize power.

A minor aristocrat named as Prince Heinrich XIII, 71, is alleged to have been central to their plans.

According to federal prosecutors, he is one of two alleged ringleaders among those arrested across 11 German states.

The plotters are said to include members of the extremist Reichsbürger [Citizens of the Reich] movement, which has long been in the sights of German police over violent attacks and racist and antisemitic conspiracy theories. They also refuse to recognise the modern German state.

Other suspects came from the QAnon movement who believe their country is in the hands of a mythical “deep state” involving secret powers pulling the political strings.

Interior Minister Nancy Faeser assured Germans that authorities would respond with the full force of the law “against the enemies of democracy”.