Indian refiners have secured crude supply at least through August as they boost purchases from the United Arab Emirates (UAE), Africa, and Brazil, trade sources told Reuters on Thursday. India's state-run refiners have been lifting growing volumes of both crude and liquefied petroleum gas (LPG), the main cooking fuel in the country, from the UAE after India last month signed a strategic agreement with Abu Dhabi's national oil company ADNOC for crude and LPG supply. ADNOC is offering crude from Fujairah, which sits outside the Strait of Hormuz,…