KIEV, June 5 - A mass grave holding the remains of thousands of Jews killed by the Nazis has been found in southern Ukraine near the site of what was once a concentration camp, a Jewish community representative said Tuesday.

The grave was found by chance last month when workers were preparing to lay gas pipelines in the village of Gvozdavka-1, near Odessa, said Roman Shvartsman, a spokesman for the regional Jewish community.