The strikes by the U.S. over the weekend raises speculation of how Tehran could respond as President Donald Trump discussed a “regime change″ in Iran.

As Trump considers joining the war in the Middle East, Iran’s ally says there could be potentially perilous consequences for the world.

U.S. President Donald Trump on Sunday raised the question of regime change in Iran following U.S. strikes against key military sites over the weekend, as senior officials in his administration warned Tehran against retaliation.

Aside from condemning the U.S. attacks, Russia has not taken any more concrete moves to support Iran as its foreign minister visits Moscow.

Russia condemned the U.S.'s strikes against Iran, describing them as a "dangerous escalation" and a violation of international law.

MOSCOW (Reuters) -Russia deeply regrets and condemns the U.S. strikes on Iranian nuclear sites, the Kremlin said on Monday. The U.S. actions had increased the number of participants in the conflict and ushered in a new spiral of escalation,