The organisers of the 16th NAM summit placed at least three blast-shredded cars of the murdered nuclear scientists at the main entrance of the venue to protest their killings.
Five Iranian nuclear scientists, including a manager at the Natanz enrichment facility, have been killed since 2010.
Mostafa Ahmadi Roshan, a chemistry expert and director of the Natanz uranium enrichment facility, became the latest victim when he was killed in a bomb attack in January 2012.
Iran has blamed the Israeli spy agency Mossad as well as America's CIA and Britain's MI6 for the killings, with support from some of Iran's neighbours. The US and Britain have denied involvement in the killings. Israel has not commented.
In his opening remarks today, Iranian Foreign Minister Ali Akbar Salehi urged the NAM countries to support Iran's "legitimate rights" to nuclear activities.
The officials from 120 NAM member states today met to work on the agenda of the heads-of-state summit to be held on Thursday and Friday.
The killings of Iranian nuclear scientists began with the assassination of Masoud Ali Mohammadi, an Iranian quantum field theorist and elementary-particle physicist. He was killed in January 2010 in front of his home in Tehran.
Iran's current Vice President and Head of Atomic Energy Organization Fereydoon Abbasi-Davani survived an assassination attempt on November 29, 2010, in Tehran. But a separate bomb attack the same day killed Majid Shahriari, a nuclear engineer who worked with the Atomic Energy Organization of Iran.
