Iran said on Monday it has yet to decide whether to extend a monitoring deal with the UN nuclear watchdog which ended last week, Reuters reported.
Earlier, Washington has warned that Tehran's failure to renew the monitoring deal would complicate talks to revive its 2015 nuclear accord.
"No decision has been made yet, either negative or positive, about extending the monitoring deal with the International Atomic Energy Agency (IAEA)," Foreign Ministry spokesman Saeed Khatibzadeh told a televised weekly news conference.
An earlier agreement between the country and the UN watchdog granted the International Atomic Energy Agency's collection of data on some of Tehran's activities.
Tehran and Washington have been holding indirect talks on reviving the 2015 nuclear deal between Iran and major powers that imposed restrictions on Tehran's nuclear activities in exchange for lifting international sanctions.