A Vietnamese jet had seen the object earlier on Monday but was unable to get close enough to determine what it was, Pham Quy Tieu, Vice Transport Minister and deputy head of the countrys rescue committee, told Reuters.
The Civil Aviation Authority of Vietnam said on its website searches were being conducted about 140 km (90 miles) southwest of Tho Chu island, which is located about 200 km off the coast of southern Vietnam.
(H-AK)
Editor: Ella Syafputri
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