Airports across Europe have increased their security after multiple explosions in Brussels.
Heathrow and Gatwick airports in London have reportedly increased security and patrols in response to the explosions at Brussels Airport overnight, while the Eurostar has cancelled all trains to and from the Belgian capital.
“As a result of the terrible incidents in Brussels, we have increased our security presence and patrols around the airport,” Gatwick Airport said in a statement.
Heathrow Airport says it is working with police to provide a “high visibility” presence.
British Prime Minister Cameron said on Twitter he was “shocked and concerned” by the events in Brussels and will be holding an emergency cabinet meeting on the attacks.
“I will be chairing a COBRA meeting on the events in Brussels later this morning,” Mr Cameron said.
An Australian embassy spokesman in Brussels said staff were monitoring the situation and trying to determine if Australians were involved.
French President Francois Hollande is holding an emergency meeting with the prime minister, defence minister and interior minister.
France remains in a state of emergency after the paris attacks that killed 130 people last Novemeber.
Interior Minister Petteri Orpo said Tuesday that officials had stepped up security at the Helsinki Airport, adding that authorities were closely following the situation in Brussels.
This morning Finnish national carrier Finnair diverted its morning flight to Brussels to Amsterdam in the Netherlands. The airline had another three flights scheduled to fly between Helsinki and Brussels on Tuesday, however the fate of the afternoon flights remained uncertain Tuesday morning.
Russia’s Transport Minister Maxim Sokolov said security at Russian airports will be re-evaluated.