07:06Newsday21/02/2022 07:06 GMT : US says Russia has amassed more than 150,000 troops around UkraineBBC World Service Duration: 50 minutes Mon 21st Feb 2022, 07:06 on BBC World Service West and Central AfricaDiplomatic efforts to stop Russia from invading Ukraine have intensified. Show more GenresNewsFormatsMagazines & ReviewsBrandNewsday Source: BBC Online