US Secretary of State Marco Rubio met Adani Group chairman Gautam Adani and Tata Sons chairman N Chandrasekaran in Mumbai on Wednesday morning before heading to Jamnagar in Gujarat to visit Reliance Industries' giant oil-refining complex, the world's largest single-site refinery, along with Vantara and giga factories being developed by the conglomerate.

Rubio, who arrived in Mumbai on Tuesday afternoon, first met Adani, followed by a meeting with Chandrasekaran, sources said.