Indian and Pakistani officials on Tuesday began hammering out details for building a US$4 billion (¤3.35 billion) pipeline to bring Iranian natural gas to India through Pakistan, The Associated Press reported. The two-day talks in New Delhi will focus on financing the 2,775-kilometer (1,735-mile) pipeline, on pricing and sharing the gas, and on security, officials said. As the talks began Tuesday, both sides were optimistic that they would be able to smooth out the project's security and commercial aspects. "We expect the talks to be serious, productive," said Ahmed Waqar, Pakistan's petroleum secretary.