The US has released a list of Gitmo detainees’ names, but Human Rights First and Amnesty International want to find out where the top terrorists are being held, and tell the world. And they’re hinting darkly at still unrevealed secret prisons.

The release will help lawyers and other advocates track who has been held at the base and find former detainees to help investigate allegations of abuse, said Priti Patel, an attorney for New York-based Human Rights First.

While the release of Guantanamo names is welcome, human rights groups also want to learn the identities of all those held in Iraq, Afghanistan and secret locations, Patel said. “There’s still much more in darkness,” she said.

For example, the United States has not disclosed where it is holding Khalid Shaikh Mohammed or Ramzi Binalshibh, who allegedly plotted the Sept. 11 terrorist attacks, and other captured top al-Qaida figures. The list released Monday also does not specify what has happened to former Guantanamo Bay detainees.

The fate of some is documented. All British nationals held at Guantanamo Bay, for example, were transferred back to Britain. But what has become of dozens of other detainees was not known. Some could be free. Others could be in secret U.S. detention centers, or in torture cells of prisons in other countries. [Are those the only choices? —ed.]

Jumana Musa, an official with Amnesty International’s Washington office, said there have long been rumors that the CIA has a secret prison at Guantanamo Bay, an isolated base along the Caribbean which Cuba granted to Washington by treaty a century ago.