Tens of thousands of supporters rallied Sunday for Argentine President Cristina Kirchner, days after a judge dismissed allegations brought against her by a prosecutor who died mysteriously.

Seeking to seize the spotlight from a mass rally last month in memory of late prosecutor Alberto Nisman, whose death unleashed a crisis for Kirchner's government, the president's supporters flooded the streets around Congress for her final opening address before the legislature.

Israeli Prime Minister Benjamin Netanyahu is "welcome" to deliver his US speech, Secretary of State John Kerry said Sunday, insisting that Washington is eager to avoid a "political football" over the controversial visit.

"The Prime Minister of Israel is welcome to speak in the United States obviously and we have a closer relationship with Israel right now in terms of security than in any time in history," Kerry told ABC television's "This Week" program.

A first Iranian flight landed in the Yemeni capital on Sunday, a day after officials from the Shiite militia-controlled city signed an aviation agreement with Tehran.

The Mahan Air plane arrived in Sanaa carrying a team from the Iranian Red Crescent and medical aid, an aviation official told Agence France-Presse.

Israeli Prime Minister Benjamin Netanyahu was due in Washington Sunday on what he has called a "historic" quest to stop an international nuclear deal with Iran that the United States is determined to pursue.

Netanyahu's controversial 48-hour visit has stoked discord with U.S. President Barack Obama and brought bilateral relations to their lowest point in years.

Iran on Saturday shrugged off a bid by Israeli Prime Minister Benjamin Netanyahu to abort a nuclear deal between Tehran and world powers by lobbying opposition in a speech to the U.S. Congress.

"I believe this effort is fruitless and it should not be an impediment to an agreement," Iranian Foreign Minister Mohammad Javad Zarif said at a joint press conference with his visiting Italian counterpart Paolo Gentiloni.

Iran blocked a website Friday for publishing reports about and pictures of former reformist president Mohammad Khatami despite a judicial ban, state-run IRNA news agency said Friday.

The agency, quoting a judicial source, said the Tehran prosecutor's office "demanded the filtering" of Baharnews.ir because of the posts.

An Argentine judge on Thursday dismissed the case against President Cristina Kirchner for allegedly shielding Iranian officials from prosecution over the 1994 bombing of a Buenos Aires Jewish center.

Prosecutors had sought to relaunch the case against Kirchner that was being brought by their late colleague Alberto Nisman, who died mysteriously last month after accusing Kirchner of protecting Iranians suspected of ordering the deadly bombing at the Argentine Jewish Mutual Association.

An adviser to the Iranian president has admitted that human rights violations are being committed in the Islamic republic, blaming them on "extremist" members of the regime, newspapers reported Thursday.

Ali Younessi, a former minister of intelligence who now serves as President Hassan Rouhani's adviser on religious and ethnic minorities, said Iran "should be able to get rid" of such individuals, media said.

Argentina's congress passed early Thursday a bill creating a new intelligence service after the mysterious death of a prosecutor probing the president over a possible cover up of a terrorist bombing in 1994 targeting Jews.

By a vote of 131 to 71, the Chamber of Deputies passed the bill presented by President Cristina Kirchner.

The United States and Iran have a "mutual interest" in defeating the Islamic State group but the long-time foes are not cooperating to do so, Secretary of State John Kerry said Wednesday.

"They are totally opposed to ISIL and they are in fact taking on and fighting and eliminating ISIL members along the Iraqi border near Iran and have serious concerns about what that would do to the region," Kerry told lawmakers, referring to IS by another acronym.