Commenting on the blast Bildt wrote " Horrible terrorist attack in one of the Moscow airports. Our deepest sympathies with the Russian people.”
Bildt later told TT news agency "I condemn this in the strongest possible terms."
Bildt pointed out that conflicts in the Caucasus have often been behind previous terrorist attacks in Russia, but he didn't speculate about what might be behind Monday's deadly attack. "I know nothing about it," he said.
The Swedish Foreign Ministry reports no news of any Swedes injured or killed in the bomb attack.
The head of SAS's press office, Elisabeth Manzi, says that the airline's planes have not been affected, but that they will follow developments in the situation.