AA flight with problems?

[Kelvin]

I have just seen flight AA908 from Buenos Aires to Miami (B777; reg N786AN) has done a U turn north of Bogota and appears to be heading toward Bogota, squawking 7700.

[Kelvin]

Found the answer this morning.
Apparently there was a cargo fire indication which turned out to be a false alarm.
Still, better a false alarm than another Valujet 592 disaster.