New Delhi: Saudi Aramco has expressed interest in buying stakes in existing Indian refineries and expansion projects, besides picking up a stake in the 60-million-tonne greenfield refinery on the west coast.

"Agreements have been already signed that allows discussions to start on the configuration of the (60 million tonnes a year) refinery, on design basis and pre-feasibility studies," Saudi Arabia's oil minister Khalid al-Falih said on Saturday.

He said during his two-day visit, discussions were held about the commitment of Aramco to the west coast refinery and other investment opportunities.

"Aramco is looking at other opportunities to buy into existing refineries in India as well as upgrades of existing units. So, there are at least three different tracks about which I cannot reveal more. One is the greenfield west coast refinery, which is already public, but there are discussions with expansions as well as buying stakes in major existing assets," he said.

"All of these are illustrated commitments by the kingdom and the company to be not only a supplier, but an investor in India at an unmatched scale," al-Falih said.

On the stake Aramco is looking to pick up in the west coast refinery, he said: "The more the better. We are not constrained by capital, feed stock or size."