Aizawl district superintendent of police C Laldina said the bodies were spotted by people having jhum plots nearby.
The couple were working in their jhum farm and had stayed in the hut there since Monday.
The bodies bore wounds, specially on their throats which were suspected to have been inflicted with sharp weapons, he said.
In another incident, a person working for Pentecostal Church and his 12-year-old daughter were drowned in Mar river near Hortoki village in Kolasib district this morning.