Iran warned Romania on Monday it would respond politically and legally if the country allowed the United States to use bases on its territory for operations against Iran.
Foreign Ministry spokesperson Esmaeil Baghaei said Tehran was urging countries not to become involved in the war.
"If Romania makes its bases available to the United States, it would amount to participation in military aggression against Iran," Baghaei told a weekly news conference.
He said such a move would be unacceptable under international law and would carry international responsibility for Romania.