Croatia's Prime Minister Andrej Plenkovic on Monday evening condemned the terrorist attack in Vienna, and expressed solidarity with the Austrian people after multiple shootings in the first district in the Austrian capital.

“Croatia stands by you in these these difficult moments,” the Croatian premier wrote on his Twitter.

Croatia’s Foreign and European Affairs Minister Gordan Grlic Radman also condemned the terrorist attacks as an act of violence and hatred.

During the multiple shootings in the centre of Vienna, at least four people, including a perpetrator, were killed, the local police stated.

Austrian Interior Minister Karl Nehammer told the Austrian ORF broadcaster that several gunmen perpetrated attacks at six locations near the Vienna synagogue. Nehammer said later that at least one of the perpetrators was an Islamist terrorist.

The centre was cordoned off, and a police operation was under way.

According to the local authorities, at least 15 people were wounded in the shootings and some of them sustained serious injuries.

The attack was condemned by Germany, France, and the European Union. European Council President Charles Michel labelled the shootings as a cowardly attack and said that the EU stood by the Austrians.