Japan and India are at odds over provisions attached to a civil nuclear cooperation pact, including one that bans the transfer of "sensitive technology" from Japan that could be used to develop atomic weapons, sources close to the bilateral negotiations said.

The sides are divided over a provision that could give India the ability to reprocess spent nuclear fuel discarded by power plants, which would be built using Japanese machinery and materials, to extract plutonium, the sources said Sunday.

The differences are likely to prolong the negotiations, they said.