LONDON, United Kingdom - Tehran will continue to push for a full removal of "unjust" sanctions in its ongoing negotiations with Washington, according to Iran's Foreign Ministry spokesperson Ismail Baghaei.

Highlighting what he described as a long history of American non-compliance with past commitments, Baghaei noted that all sanctions imposed on Iran over the past few decades have been "unjustified, unlawful, and tyrannous," as he addressed reporters at a weekly press briefing in Tehran on Monday.

Iran and the United States are expected to enter a third round of their recently initiated negotiations on Tehran's nuclear program this week. Mediated by the Omani government, the first two meetings were held in Muscat and Rome on April 12 and 19, respectively.

Iranian and American authorities have both cautiously commended progress in the talks. Yet few details have been officially released on the precise matters discussed in the negotiation rooms.

Baghaei cited Iran's "experience" in the face of US promise-breaking when it comes to sanctions removal. He was referencing the landmark multilateral Iran nuclear deal—known as the Joint Comprehensive Plan of Action (JCPOA)—which Washington withdrew from during President Donald Trump's first term in office in 2018.

Iran insists that any new accord must recognize its right to maintain a nuclear enrichment program at the 3.67% level. The current level exceeding 60% has fueled global concerns over Tehran's proximity to the "breakout"—the point at which it will have the effective capacity to produce nuclear bombs.

In the course of the recent negotiations, the United States has sent out seemingly mixed messaging, alternating between a recognition of Iran's right to engage in low-level Iranian enrichment and an absolute demand for the dismantling of its nuclear program altogether.

The sanctions relief Iran is seeking, according to Baghaei, must be far-reaching, with concrete outcomes in "economic, trade, commerce, and banking sectors," allowing Iran to function "normally and sustainably" across those areas.

The spokesperson also announced that Foreign Minister Abbas Araghchi—Iran's lead negotiator in the ongoing talks—is heading to Beijing on Tuesday for discussions with Chinese officials. Last week, on the eve of the Rome talks, Araghchi also visited Russia—another key regional ally of Tehran—for consultations with President Vladimir Putin on the nuclear dossier.