Brief: Sovereign Metals Says Rio Tinto To Invest Additional A$18.5 Million
July 3 (Reuters) - Sovereign Metals Ltd SVM.AX :
* RIO TINTO TO INVEST ADDITIONAL A$18.5 MILLION
* RIO TINTO NOTIFIED IT HAS EXERCISED SHARE OPTIONS TO
INCREASE
SHAREHOLDING IN SOVEREIGN TO 19.76%
Further company coverage: SVM.AX
((Reuters.Briefs@thomsonreuters.com;))