By Fabio Teixeira and Marta Nogueira
RIO DE JANEIRO, March 3 (Reuters) - London listed oil company Shell SHEL.L is committed to investing 3.5 billion reais ($667.84 million) in troubled sugar and ethanol maker Raizen RAIZ4.SA - which it controls in a joint venture with Brazilian conglomerate Cosan CSAN3.SA - the energy company's Brazil CEO said on Tuesday.
Raizen has reported a string of losses and soaring net debt in recent quarters amid costly investments and poor weather negatively impacting crops, prompting the company to issue a warning in February about its ability to continue operating.
($1 = 5.2408 reais)
(Reporting by Fabio Teixeira and Marta Nogueira; Writing by Oliver Griffin; Editing by Gabriel Araujo)
((oliver.griffin@thomsonreuters.com; +55 11 95361-2170))