The latest round of discussions broke up without a deal.
The US had warned that "very difficult issues" remain unresolved after the failed talks, which were held in China.
Both sides are attempting to secure a new deal before further US tariffs are imposed on 1 March.

Indian state shuts some Domino's, Pizza Hut outlets, citing hygiene lapses
ADNOC's XRG advances global gas strategy with Venezuela entry
Iger, Kushner purchasing Lakers for record $12.5 billion
Chair of India's Tata to step down after tension with controlling charity
Emirates offers flyers to Dubai unlimited free date changes
