Militants in Iraq have seized several foreign hostages during a weeklong uprising and have briefly detained a number of foreign journalists. Here is a list of people still missing or confirmed captured:

— An American was captured Friday by insurgents who attacked a fuel convoy near Baghdad. The man spoke with a southern accent and identified himself to a reporter for Australian television.

— Two U.S. service members and several contract employees were still unaccounted for from attacks on Friday, a Pentagon spokesman said Saturday. It was unknown if they had been captured or killed.

— Japanese aid workers Noriaki Imai, 18, and Nahoko Takato, 34, and photojournalist Soichiro Koriyama, 32 were taken hostage in southern Iraq, but the exact date of their capture was unclear. Their captors threatened them with knives in a videotape and have vowed to burn them alive if Japan does not withdraw its troops.

— Militants on Wednesday kidnapped two aid workers in Najaf: Fadi Ihsan Fadel, a Syrian-born Canadian who works for the International Rescue Committee (search), and Nabil Razouk, 30, an Arab from East Jerusalem who also works for the U.S. Agency for International Development (search).

— A group calling itself the "Marytr Ahmed Yassin Brigades (search)" in the city of Ramadi, west of Baghdad and Fallujah, claimed in a video shown on Al-Arabiya television to have 30 hostages from the United States, Japan, Spain and Bulgaria. No hostages were shown, and there was no way to verify the group's claims.

— Two security agents from the German Embassy in Baghdad were missing, Germany's Foreign Ministry said. German ZDF and ARD television said the men were ambushed Wednesday while on a routine trip from Amman, Jordan to Baghdad.

— Seven South Korean missionaries were held briefly before being released Thursday.