President Donald Trump’s National Security Council has drawn up a range of options should the President decide to take action against Russia after the poisonings of a former spy and his daughter on UK soil, according to multiple State Department officials and a person familiar with the discussion.

The officials said there have been inter-agency discussions involving the State Department and White House.

The sources said the most severe option being considered is for the US to expel more Russian diplomats. One of the officials said that would be a “very serious step,” especially given the last round of tit-for-tat expulsions, which left Russia and the US with significantly smaller diplomatic forces in each other’s countries.