Israel's UN envoy praised Argentina for reinvigorating its investigation on Friday of a deadly 1994 bombing of a Jewish center in Buenos Aires that Argentine authorities have blamed on Iran.

"I think they're re-energizing" their work on the case, Israel's UN Ambassador Ron Prosor told reporters.

"In the past there was not a real motivation to check (the facts)," he said. "I see it differently today. One should give them credit for it. I see it differently today on the Argentinian side."

The bombing of the Argentine Israeli Mutual Association building killed 85 people and injured hundreds of others. In 2007, Argentine authorities secured Interpol arrest warrants for five Iranians and a Lebanese in connection with the attack.

Tehran denied links to the bombing but offered talks with Argentina last July to start "shedding light" on the case.

The bombing virtually froze Argentina's relations with Iran, though the two countries recently have expressed a desire for better relations.

Argentine President Cristina Fernandez told the UN General Assembly last September that Buenos Aires was ready to engage in dialogue with Iran.

Concerned about a possible warming of ties between Iran and Argentina, including a sharp increase in bilateral trade, Western and Israeli officials expressed concern that Buenos Aires was quietly reaching out to Tehran while they were seeking to isolate Iran over its nuclear program.