VIENNA-- International Atomic Energy Agency (IAEA) Director General Rafael Grossi will travel to Tehran for high-level meetings at the invitation of Iran's government, the agency tweeted on Thursday.

The announcement came after recent reports that Iran has enriched uranium to near weapons-grade levels of about 84 percent.

On Feb. 19, Bloomberg cited two senior diplomats as claiming that IAEA inspectors in Iran had detected uranium enriched to levels "just below that needed for a nuclear weapon." Iranian authorities have rejected such reports in the past few days.

Mohammad Eslami, president of the Atomic Energy Organization of Iran, on Wednesday said that his country and the IAEA had discussed and finalized a number of issues at the level of experts and claimed that there had been no "deviation" from the country's peaceful nuclear activities.

Eslami added that during his stay in Tehran, Grossi will discuss safeguards issues and the closure of the case.

The IAEA said in its tweet on Thursday that Grossi will hold a press conference upon his return from Tehran to Vienna late Saturday afternoon.

In recent months, the IAEA has criticized Iran for its lack of cooperation with the agency.

In November last year, the IAEA's Board of Governors passed a resolution proposed by the United States, Britain, France and Germany that called on Iran to collaborate with the agency's investigators regarding the alleged "traces of uranium" at a number of its "undeclared" sites.

Iran has repeatedly rejected such allegations and insisted on the peaceful nature of its nuclear program.