A former Argentine Nobel Peace Prize Winner disagreed over U.S. President Barack Obama's planned visit to Argentina on March 24.

Adolfo Pérez Esquivel said that Obama should not push through with his visit next month because that's the 40th anniversary of a coup that installed a U.S.-backed military government, the Associated Press reported (via Yahoo! News). Around 30,000 people were killed or disappeared during the 1976-1983 dictatorship period in Argentina, according to human rights groups.

Esquivel, 84, said Obama's effort to get close to the Latin American region is commendable, but insisted that the leader's upcoming visit is ill-timed. He aims to publish an open letter this week, the AP further reported.

"I'm a survivor of that era, of the flights of death, of the torture, of the prisons, of the exiles," said Esquivel, as quoted by the AP. "And when you analyze the situation in depth, the United States was responsible for the coups in Latin America."

Obama plans to reach Buenos Aires on March 23, which is after his historic visit to Cuba on March 21-22, the AP added. Noah Mamet, the U.S. ambassador to Argentina, said the trip had to take place on those days because it combines with his visit to Cuba.

Esquivel said he previously talked to Obama about human rights issues, such as the undefined detentions of prisoners at the U.S. military base Guantanamo Bay, the AP noted.

Esquivel won the Nobel Prize in 1980 for defending human rights when Argentina was still under dictatorship, the news outlet wrote. 

Protests Arise

Obama's planned visit to Argentina met negative remarks from several human rights groups, the AP reported. They said that during the Cold War, military governments supported by the United States across Latin America boomed. The groups also took note of former U.S. Secretary of State Henry Kissinger, who approved the implementation of "dirty war tactics" to impose civil order.

Argentine President Mauricio Macri defended Obama's visit by talking to human rights groups and assuring them that it won't interfere with commemorative events, the AP added. Activists, however, are adamant about their disapproval.

Macri, who was educated in the United States and is a conservative supporting the business industry, has vowed to strengthen Argentina's foreign ties since he became president in December. Italian Prime Minister Matteo Renzi visited Argentina last week, while French President Francois Hollande's visit took place on Wednesday, the AFP reported (via Yahoo! News).

Argentine Foreign Minister Susana Malcorra said Obama's trip is expected to center on tourism, agriculture and investment in renewable energy, AFP listed.