Sri Lanka, Aug. 17 -- A planned visit by U.S. trade negotiators to New Delhi from August 25-29 has been called off, a source said, delaying talks on a proposed trade agreement and dashing hopes of relief from additional U.S. tariffs on Indian goods from August 27.

The current round of negotiations for the proposed bilateral trade agreement is now likely to be deferred to another date that has yet to be decided, the source with direct knowledge of the matter said.

The U.S. embassy in New Delhi said it has no additional information on the trade and tariff talks, which are being handled by the United States Trade Representative (USTR).

India's trade ministry did not immediately reply to a Reuters email seeking comments.

Earlier this mont...