DUBAI (Reuters) - A militant group headed by al Qaeda ally Abu Musab al-Zarqawi has killed a second American captive in Iraq after the lapse of a 24-hour deadline on Tuesday, Arabic television channel Al Jazeera said.
It said a statement announcing the killing of American Jack Hensley by the Tawhid and Jihad group was posted on the Internet. It gave no further details.
On an Islamist site, a contributor who has in the past posted messages in the name of Tawhid and Jihad said the group would soon post pictures of the "slaying."
Hensley's reported death comes a day after the group beheaded American Eugene Armstrong who was also kidnapped along with Hensley and Briton Kenneth Bigley last week.
There was no word on Bigley's fate.
In Washington, a State Department official said: "We take these reports seriously but I don't think we have a body yet."
Tawhid and Jihad had threatened to kill the hostages unless women prisoners were freed from Iraqi jails.
The U.S. military says no women are being held in the two prisons specified, but that two are in U.S. custody and are accused of working on ousted Iraqi President Saddam Hussein's weapons program.
AG: Another head... live from "Iraqi TV"... please find in which channel.