Sao Paulo, Aug. 7 -- Brazil's government has said that the recent change in the US visa status of Brazilian Ambassador to the US Maria Luiza Viotti does not amount to a visa revocation but rather a modification limiting it from multiple entries to a single entry, according to a report by Brasil 247.

The Brazilian presidency reportedly considers the measure serious but maintains that it does not affect the ambassador's diplomatic privileges, immunities or her ability to continue performing official duties in Washington.

Officials describe the US decision as an unusual measure and say its implications are being assessed carefully. The situation remains uncertain because of what Brazilian authorities consider ambiguous statements by US off...