GE Transportation, a division of General Electric of the US, and Alstom, the French engineering company, are frontrunners to win multibillion-dollar contracts to build and sell train locomotives as part of India's ambitious railway modernization program, officials familiar with the bidding process said.

The two companies have been selected from a shortlist of seven — which included Bombardier, Siemens and Electro-Motive Diesel — to supply at least 1,800 diesel and electric locomotives over 11 years from two factories that are due to be built in the Indian state of Bihar, the officials said.