India criticized Pakistan after reported nuclear threat remarks by Pakistan's army chief in the U.S., calling it 'sabre rattling.' India and Pakistan, both nuclear-armed, have faced conflict over Kashmir.

While India's S. Jaishankar and China's Wang Yi "said the right things," analysts say nothing has changed for the regional rivalry.

Donald Trump's lunch meeting with Pakistan's military chief and other tensions in the U.S.-India relationship, after decades of flourishing ties, have cast a shadow in trade negotiations.