VIENNA - Iran's nuclear energy chief said on Tuesday he had held "very good" and "transparent" talks with the head of the UN atomic agency, and had invited him to visit the Islamic state's atomic facilities. Fereydoun Abbasi-Davani, head of Iran's Atomic Energy Organisation, said the two sides pledged to resolve problems through more dialogue in future but did not give any details on what was discussed. "We don't have a difference of view," he told reporters after holding a rare meeting with UN nuclear agency chief Yukiya Amano in Vienna. Relations between Iran and the International Atomic Energy Agency have become increasingly strained over the last year, with Tehran rebuffing IAEA appeals for information and access to help clarify allegations of military-linked nuclear work. Western powers suspect Iran is seeking to develop a nuclear weapons capability, a charge the Islamic state rejects. Abbasi-Davani said he had invited Amano "and his colleagues to come to visit anywhere they like in all our nuclear installations." He was appointed head of Iran's atomic agency earlier this year, a few months after the nuclear scientist was slightly wounded in a bomb attack in November 2010, which Tehran blamed on its arch foe Israel. Abbasi-Davani has been personally subjected to UN sanctions because of what Western officials said was his involvement in suspected nuclear weapons research. Iran's refusal to halt enrichment has led to four rounds of UN sanctions on the major oil producer, as well tighter US and European Union restrictions on top.