A man killed two police officers and the driver of an emergency rescue vehicle on Tuesday before barricading himself inside a farm building in a lower Austrian town, the DPA news agency said, citing an unidentified police spokesman.
Interior Minister spokesman Karl-Heinz Grundboeck said a third police officer was apparently being held by the shooter.
Mr. Grundboeck confirmed that three people were shot but refused to say whether their injuries were fatal, explaining that officials did not want to give the gunman information through news reports he was likely monitoring.
A police officer in Annaberg, about 115 kilometres (70 miles) southwest of Vienna, told The Associated Press that SWAT teams had blocked off the perimeter of the building. He refused to identify himself on the telephone.
With an Interior Ministry news blackout in force, no further official information was immediately available.
The website of state broadcaster ORF said the man was a 55-year-old poacher who fled when approached by police, then shot a member of Austria’s Cobra SWAT team after his car landed in a ditch. ORF said he subsequently shot the driver and then a second police officer at a roadblock before barricading himself.