Police are assessing a post linked to the group Palestine Action made by Sarah Helm, the wife of Jonathan security adviser Jonathan Powell, officials said.
Downing Street was quick to draw a distinction between Ms Helm and the government. A spokesperson said Ms Helm "does not represent the government in any capacity," underlining that her public comments are personal and not official statements.
The national security adviser, Jonathan Powell, is a senior figure within the government, and the post by his wife has prompted interest from both police and political commentators because of the association. Authorities said they were evaluating the content of the post to determine whether any further action is required.
Police assessments in such cases typically involve considering whether any criminal offences may have been committed and whether there is a need for further enquiries; no arrests or charges have been announced. Downing Street reiterated that the views of relatives of government officials are private and do not reflect government policy.
The situation is ongoing and may develop as police complete their review. Officials declined to expand further on the matter while the assessment continues.