Kidnapped American journalist Jill Carroll has appeared in a new video urging that the demands of her Iraqi captors be met as quickly as possible.

A Kuwaiti television station aired the plea from Carroll. The freelancer, 28, who was kidnapped January 7, warned that time is running out.

Her captors, who have previously threatened to kill her, are demanding that all female detainees in Iraq be released.

Meanwhile, tens of thousands of Shi'ite Muslims gathered Thursday in the Iraqi holy city of Karbala for observances honoring Shi'ite leader Imam Hussein, who was killed in the battle of Karbala in the 7th century A.D. He was the Prophet Muhammad's grandson.

Security was tight for this year's Ashura observances. More than 200 people were killed in bombings in Iraq on the holy day in the last two years.

Elsewhere Thursday, a suicide car bomber killed five Iraqis and wounded a U.S. marine near the border with Syria.

Some infornation for this report provided by AP and AFP.