Shots have been fired near a synagogue in Vienna and there have been casualties, local police have confirmed.
At least one person is believed to have been killed and several others injured in the ongoing incident.
A police officer has been shot and is in a serious condition, reports Austrian news outlet Kronen Zeitung.
The public have been told to avoid the area, in Vienna’s central First District, as well as refrain from using public transport.
The official Twitter account for the Viennese Police said: “Shots fired in the Inner City district – there are persons injured – KEEP AWAY from all public places or public Transport – don’t share any Videos or Fotos [sic]!”
Austrian journalist Thomas Mayar, citing the Ministry of the Interior, tweeted: “One dead and several injured in an attack on the synagogue in Seitenstettengasse in the centre of Vienna, says the Ministry of the Interior. Large-scale police operation. Stay in the houses. Shots on Schwedenplatz.”
The Ministry of the Interior has reportedly said the shooting may have been a terror attack or an attempted assassination.
Local outlet ORF reports that one perpetrator has been killed while another may be on the run, perhaps armed with an explosive device.
Disclose TV reports that at least seven people have been killed, but this has yet to be confirmed by any official sources.
Officers have cordoned off the area where the shots were fired, near the public square Schwedenplatz.
Footage uploaded to social media appears to show police officers attending the scene, with gunfire heard in multiple clips.
Another video uploaded by Disclose TV appears to show a man wearing a balaclava and holding a large firearm running through the streets of Vienna.
This footage has yet to be confirmed as related to the ongoing incident.
According to unconfirmed reports, the synagogue was not the only target of Monday evening’s apparent terror attack. Disclose TV reports that two restaurants and the local Jewish Community Centre were also targeted.
One clip shows armed police walking through a restaurant as patrons cower at tables.
There are unconfirmed reports that the city’s Jewish residents are being advised not to leave their homes until further notice from authorities.
Viennese Police have repeatedly urged people not to upload footage from the scene, saying on Twitter: “Again: DO NOT post videos and photos in social media, this endangers both emergency services and the civilian population!”
The shooting comes just days after France was targeted in a string of Islamic terror attacks, one of which saw two people decapitated in a church in Nice.