Police say a man has been shot dead outside the Iranian ambassador's residence in the Austrian capital, Vienna, after he attacked a guard with a knife.
The assailant "died on the spot" after the soldier opened fire, police spokesman Harald Soeros said.
One guard suffered a cut to the upper arm during the attack at about 23:35 local time (00:35 GMT) on Sunday and has been sent to hospital, police said.
Police said the assailant's apartment in Vienna was searched on Monday, but there was no immediate sign of evidence that would point to a motive.
OJ Simpson Was Nearly on 'The Simpsons' 25 Years Ago
The interview was filmed around the time Simpson was set to release If I Did It , a "fictionalized" confession to the murders. During the interview, he reportedly offered a hypothetical scenario involving himself and someone named Charlie.
Cristiano Ronaldo scores twice as Real Madrid edge past Eibar
Sergio Ramos went missing for about 10 minutes in the latter stages of Real Madrid's La Liga game against Eibar on Saturday. Raphael Varane was forced to come off after a clash of heads during Real Madrid's La Liga clash with Eibar on Saturday.
San Francisco 49ers: Pros & cons for signing cornerback Richard Sherman
Should a signing not happen before Sherman leaves Santa Clara, his next visit will reportedly be with the Detroit Lions . Imagine pondering this thought back in 2014 - the San Francisco 49ers sign cornerback Richard Sherman .
A spokesman from the Defense Ministry said early indications are that the guard "acted within the rules". His motive is not yet clear.
Qassemi added, "We are making contacts with the Austrian officials in Tehran and Vienna and we hope that the Austrian security forces would reach the necessary conclusion through the investigations they have been doing since last night".
The 23-year-old Austrian soldier first tried to stop the attack with sour spray.
Police ordered reinforcements around all diplomatic missions in the Austrian capital, which is also home to many worldwide organisations.