Already denied. It was a false report. Links upthread
I still lend some credence to the report(s) specifying the locations in my first post.
I’m not so sure all Vietnamese officials are coordinated in real-time on this. So the info may take some time to disseminate.
Also the reports I read specified the potential crash location from multiple different locations on land. Ex. 153 miles south of Phu Quoc Island, 140 miles southwest of Ca Mau, and also 140 miles off the northeast coast of Malaysia. The reporting from multiple locations suggests to me multiple sources for the reports.
Also the triangulated location would be roughly 400-500 miles from Kuala Lumpur, which considering the loss of signal roughly 2 hours after takeoff would suggest the timeframe would coincide generally with the location.