Pakistan has invited expressions of interest (EOI) from national and foreign banks for the construction of a proposed $1.2 billion pipeline to pump Iranian natural gas to the energy-starved country, government officials said on Tuesday. The Inter State Gas System (ISGS), a company set up by the government to act as project manager, has set a deadline of August 20 for the submission of expression of interest (EOI) from the banks for financial advisory services, according to a document published on Tuesday. The document did not identify the project but ISGS officials confirmed the EOI had been sought for the multi-billion Pakistan-Iran gas pipeline project.