The 20 year-old man who killed four people in the centre of Vienna on Monday night had visited Slovakia to try to buy ammunition, the Slovak authorities revealed on Wednesday.

They warned the relevant Austrian authorities, who apparently took no action, adding to a long list of security failings including the early release of the killer who had undergone ‘de-radicalisation’ and fooled the judicial system into believing he posed no threat.

In an attempt to forestall public outrage, Austrian Chancellor Sebastian Kurz said on Wednesday that the European Union should focus “much more strongly on the problem of political Islam in the future.”

He said he had spoken to President Macron about closer coordination.

Later he told German newspaper die Welt: “I hope we will see an end to this misunderstood tolerance and that all countries in Europe will finally realise how dangerous the ideology of political Islam is for our freedom and the European way of life.”

However, he had nothing to say about the security failings of Austria’s intelligence services.