April 27 (Reuters) - The Norwegian central bank on Thursday excluded two oil and gas companies from its $1-trillion wealth fund, the world's largest, for ethical concerns.

Norges Bank, which manages the fund, said in a statement that Korea Gas Corp and GAIL India have been excluded due to unacceptable risk that the companies contribute to serious violations of individuals' rights in situations of war or conflict.

(Reporting by Mrinmay Dey in Bengaluru Editing by Chris Reese)