Iran's foreign ministry spokesman has called for the US to guarantee sanctions will be lifted as a condition for a nuclear deal.

Esmail Baghaei made the comments just days after the US submitted what it calls an "acceptable" proposal.

Both countries have conducted several weeks of negotiations over Iran's nuclear programme.

The US is seeking assurances that it is peaceful, while Iran hopes to lift sanctions that have battered its economy in recent years.

Al Jazeera’s Tohid Asadi has more from Tehran, Iran.