The Austrian government approves a wide range of anti-terrorism measures in the wake of a deadly shooting spree in Vienna.

Austrian authorities have admitted official errors leading up to the Monday terror attack.

The 20-year-old attacker who recently opened fire on Vienna citizens had earlier spent a few months in the Austrian jail because of his pro-terrorism thoughts, but was released shortly before committing the horrendous crime, media reports show.

Iran’s ambassador to Baku says those involved in the assassination of top anti-terror commander Lieutenant General Qassem Soleimani are liable for the recent deadly Daesh terror attacks in the Afghan and Austrian capitals.

The Takfiri Daesh terrorist group claims responsibility for the recent deadly shooting attacks in the Austrian capital of Vienna, which left four people dead and nearly two dozen others injured.

The UK security establishment has raised the terror threat level to the second-highest category indicating that an attack is thought to be highly likely.

Austria has announced three days of national mourning as the nation reels from a deadly terrorist attack.

Gunmen opened fire in six different locations in central Vienna on Monday, killing four people.

Austria’s Chancellor Sebastian Kurz vows “decisive action” against the perpetrators of terrorist attacks in Vienna that left four people dead and a number of others injured.

Several people have been killed or injured in a “terrorist" attack in the Austrian capital Vienna, according to officials.