Germans with dual nationality will lose their German citizenship if they fight for militant Islamist groups abroad under new anti-terror proposals.

Interior Minister Thomas de Maiziere also announced plans to speed up the deportation of foreign criminals.

He announced extra personnel, equipment and surveillance powers for the police.

But he rejected banning the public wearing of the burka (the Islamic full veil). And he resisted pressure to ease medical confidentiality.

Some of his conservative Christian Democrat (CDU) colleagues have urged a burka ban but Mr de Maiziere said it would be “problematic” and “you cannot ban everything that you reject”.

Mr de Maiziere was responding to recent attacks linked to militant Islamists. Two terror attacks by Islamist migrants shocked Germany last month – in Wuerzburg and Ansbach.

“I propose that German citizens who are fighting with terror militias in other countries, and take part in combat operations there, if they have a second nationality – and only then – they would lose German citizenship,” he told a news conference.

There was a move in France recently to deprive jihadists of their French citizenship, but it did not get through parliament.