Afghanistan's Taliban rulers said Monday that a group of aid workers — including two Americans — will remain jailed until the hard-line Muslim militia completes its investigation of charges they were spreading Christianity.

Promoting any religion other than Islam is a crime punishable by death in the 95 percent of Afghanistan controlled by the Taliban. The militia says it already has statements from Afghans the group allegedly was trying to convert.

So far, the Taliban have refused to allow anyone to visit the 24 aid workers.

"They are all in good condition," said Salim Haqqani, of the Taliban's ministry for promotion of virtue and prevention of vice. "We have given them three good meals and they are living in a nice room."