Prague — Freezing rain and ice conditions caused widespread travel disruptions across Central and Eastern Europe on Tuesday, forcing airports in the Czech Republic, Austria, Slovakia and Hungary to postpone flights.

Flights to and from Vienna International Airport, one of Central Europe’s busiest airports, have been temporarily suspended. Prague’s Vaclav Havel Airport was forced to restrict arrivals, and Slovakia’s international airport was closed for several hours.

Hungary’s Transport Minister János Lázár wrote on social media that all arrivals and departures at Budapest’s Ferenc Liszt International Airport had been suspended due to “cold rain and extreme icy conditions.”

Peter Klemann, a spokesperson for Vienna International Airport, told Austrian News Agency that incoming flights were diverted to other airports, including Munich, Frankfurt, Cologne and Venice, and departures were delayed. Operations resumed in the early morning.

Public transportation has also been disrupted due to the cold wave.

According to the capital’s public transport authority, tram service in the city has been suspended due to accumulated ice after last week’s heavy snowfall. Many domestic and international rail services have been canceled or delayed.

Austrian rail operator ÖBB said delays were expected in the north and east, including Vienna, and urged travelers to postpone non-essential travel.

Czech authorities said some trains and buses were suspended and passengers from the capital’s main train station faced hours-long delays. It was also announced that the D8 highway heading towards Germany was closed due to an accident on the German side. Roads were icy in parts of eastern Germany.

Heavy snow has fallen in Romania over the past week, with temperatures expected to drop to -13 degrees Celsius in some areas, forcing some schools to move classes online.

Significant snowfall is expected in the east, with rain and freezing rain possible further west, the Hungarian Meteorological Office said in a statement.