Washington: The Obama administration has rejected as too expensive a Department of Defence cost estimate for closing the prison at Guantanamo Bay, Cuba, and building a replacement, and it has asked for revisions, the Wall Street Journal reported on Tuesday, citing officials familiar with the plan.

The Pentagon estimate for closing the prison and building another one in the United States was as high as $600 million, including $350 million in construction costs, the newspaper cited the officials as saying.