Lawmakers approved measure earlier this month
Haoyang Xu faces deportation to China
Olympic Gold medalist detained in Moscow in February
LGBTQ Russians 'will cease to be publicly known'
Human Rights Watch has sharply criticized proposal
Reuters noted WNBA star is in country's Mordovia region
WNBA star's lawyers say whereabouts are unknown
WNBA star convicted of drug trafficking, sentenced to nine years in penal colony