Iran's deputy foreign minister said on Saturday that no timeline has been agreed for the next round of Iran-U.S. peace talks brokered by Pakistan, as tensions flared again over Strait of Hormuz.

"Until we agree on the framework, we cannot set the date," Saeed Khatibzadeh told journalists on the sidelines of an annual Turkish diplomatic forum in the southern province of Antalya.

"We hope that as soon as we can finalize that, then we can move on to the next step".

Khatibzadeh said both sides were currently focused on finalizing a framework of understanding before proceeding with further negotiations.

"We do not want to enter into any negotiation or meeting that is destined to fail and could serve as a pretext for another round of escalation," he said.