The presidents of Iran, Afghanistan and Pakistan began talks in Tehran on Sunday on ways to combat terrorism, drug trafficking and other regional security problems, Reuters reported. The one-day summit is part of efforts to boost cooperation between the three neighbors. Iranian President Mahmoud Ahmadinejad hosted his Pakistani and Afghan counterparts, Asif Ali Zardari and Hamid Karzai, at the meeting in northern Tehran. "The presidents of the three countries will discuss security issues and the reconstruction of Afghanistan," Iranian state broadcaster IRIB said.