US and Argentina pledge to tackle Hezbollah's drug smuggling networks in Latin America

“And we did specifically discuss the presence of Lebanese Hezbollah in this hemisphere, which is raising funds, obviously, to support its terrorist activities.”

Mr Faurie said that outside groups must not be allowed to jeopardise what he termed a “zone of peace” that had emerged in South America.

“We need to intensify every possible exchange, not only in terms of dialogue but also in terms of information on the actions of these groups which take advantage of transnational crime to foster their interests, with which Argentina certainly does not agree,” he said.

Although Argentina’s Jewish community is by far the biggest in Latin America, the country also has a large Lebanese expatriate population and the United States suspects groups within this community are raising funds through organised crime to support Hezbollah.

During his visit Mr Tillerson also met Argentina’s President Mauricio Macri, who has shown he is willing to reverse his predecessor Cristina Fernández de Kirchner’s rapprochement with Iran.

Ms Kirchner is accused of agreeing under the terms of a secret agreement to cover up Iran’s alleged role in the 1994 bombing of the Amia Jewish community centre in Buenos Aires – an attack that killed 85 people.

A judicial investigation into the issue is underway in Argentina.