Iran today criticised Tony Blair's appointment as Middle East peace envoy but welcomed his successor as British prime minister, Gordon Brown.
"He did not have a good background and a good reputation in the region," Foreign Ministry spokesman Mohammad Ali Hosseini said when asked about Mr Blair's new post as envoy for the international Quartet.
"I doubt that this appointment would ... have a positive impact on the developments of the Middle East region," he told a news briefing.
The Quartet - the United States, the European Union, Russia and the United Nations - appointed Mr Blair on Wednesday, the day he stepped down after 10 years as British prime minister.
Under Mr Blair, Britain has played a leading role in Western efforts to isolate the Islamic Republic over its disputed nuclear programme. Iran denies accusations it is seeking to develop nuclear weapons.
Britain also took part in the US-led invasion of Iraq. Tehran blames the presence of foreign forces for the violence there and have called on them to leave its neighbour.
Arabs have also said they doubted Mr Blair could succeed as regional peace envoy because of his unpopularity and because he is too close to Israel and the United States.
They said Mr Blair had little credibility in the Middle East because he took part in the invasion of Iraq, opposed an immediate ceasefire in Lebanon last year and failed to follow up on many promises to tackle the Israeli-Palestinian conflict.
Mr Brown, who served as finance minister throughout Blair's premiership, has vowed to revitalise the ruling Labour Party and learn from what he called the divisive Iraq war, although he still backs the decision to join the 2003 invasion.