Softening its stand on the US offer, India on Thursday described the American proposal to reduce its farm aid as a "good sign" and hoped developed nations will make similar moves in other areas for reaching a breakthrough in WTO talks.

Iranian, European and US officials began talks on Saturday in a bid to resolve the dispute over Tehran's nuclear programme.

World Trade Organization head Pascal Lamy is to invite ministers from 30 leading countries to a meeting in Geneva on July 21, to try to broker a final deal in the Doha round of trade talks, a diplomatic source said on Wednesday.