A Bronze Age burial cist has been discovered at Drumnadrochit near to where two of the stone slab-built graves were previously found.
The discovery by archaeologists was made at Kilmore where housing for older people is being built.
Human remains have not survived, but parts of a pot placed in the grave did. Archaeologists said the find was further evidence of a Bronze Age cemetery near the shores of Loch Ness.
AOC Archaeology, which has been monitoring the site, said the fragments of the beaker pot dated to about 4,500-4,000 years ago.
AOC’s Inverness operations manager Mary Peteranna said: “While not completely a surprise to us, it’s always exciting to have a discovery of this calibre. More importantly, because we have a beaker inside the cist, we can connect it straightaway to the other burials we found on the site.”