Food delivery app DoorDash to buy rival Deliveroo for $3.9B / DoorDash agrees to buy Deliveroo for $3.9 billion / DoorDash Agrees to Buy Deliveroo in $3.9 Billion Deal / Doordash Agrees to Buy Deliveroo in $3.9 Billion Delivery Deal / Deliveroo agrees PS2.9bn takeover by US rival DoorDash / Deliveroo mulls 2.7bn takeover bid from US rival DoorDash / US food delivery app DoorDash offers to buy UK rival Deliveroo for $3.6bn / Deliveroo shares shoot higher after US takeover proposal / Hong Kong privacy watchdog opens compliance check against Deliveroo / Cutthroat competition: will Deliveroo Hong Kong closure affect food delivery riders?