Russian President Vladimir Putin on Tuesday condemned attacks across Vienna that left five people dead in the city center and said Moscow was ready to boost counter-terrorism cooperation with Austria.
In a telegram sent to Austrian Chancellor Sebastian Kurz, Putin called the attack a "cruel and cynical crime", the Kremlin said in a statement.
Hundreds of police fanned out across Vienna earlier on Tuesday, searching for perpetrators of the attacks after what a government minister said was an "Islamist terrorist" incident.