https://www.reuters.com/article/us-uber-grab/southeast-asias-grab-in-talks-to-buy-into-ubers-regional-business-source-idUSKCN1GK0V0 >Southeast Asia's biggest ride-hailing firm, Grab, is in advanced negotiations to buy parts of Uber Technologies Inc's business in the region, said a source with knowledge of the talks, in what would be Uber's second retreat from an Asian market.