Brazilian Foreign Minister Celso Amorim arrived in Tehran on Saturday to prepare for the upcoming Iran-Brazil summit, the official news agency IRNA reported. Amorim conveyed to Iranian President Mahmoud Ahmadinejad the written approval of President Luiz Inacio Lula de Silva for attending the summit in Tehran in the near future, without however setting a specific date, according to DPA. "We welcome the visit of President Lula de Silva and hope that the summit will lead to strengthening of friendship between the two nations," Ahmadinejad told Amorim. IRNA quoted also Amorim as hoping that the summit would expand bilateral ties and lead to a new political and economic world order. Amorim's three-day visit to Tehran is also aimed at implementing bilateral economic agreements made earlier between the two countries.