A power plant tender that sovereign wealth fund 1Malaysia Development Bhd (1MDB) is keen to win before a US$2 billion (RM6.671 billion) initial public offering (IPO) of its power assets has been delayed after bids came in too close to call, government sources said.

1MDB, chaired by Prime Minister Najib Abdul Razak, has begun the process of choosing underwriters for what is likely to be one of Southeast Asia's largest IPOs of the year.