MANILA (Reuters) -The Philippines said on Friday it aimed to add three more processing plants in the effort to develop a downstream industry for its abundant nickel resources, after nations such as China and the United States expressed interest in the mining sector. The Southeast Asian nation is looking to follow neighbouring Indonesia, which lured major investment in processing plants for its huge deposits of nickel ore after banning unprocessed exports in 2020. Environment Minister Maria Antonia Yulo-Loyzaga, whose agency also regulates mining, said the Philippines should boost its capacity to process nickel, a key component in producing EV batteries.