Iraqi and U.S. officials say an Iraqi military helicopter has crashed in northern Iraq, killing all eight people aboard, including a U.S. soldier.

Officials say the Russian-made helicopter was found Tuesday near the town of Beiji. The aircraft had disappeared in bad weather south of the main northern city of Mosul.

Separately, Iraqi Prime Minister Nouri al-Maliki Tuesday ordered Iraqi security forces to work hard to find a kidnapped Chaldean Catholic archbishop.

Paulos Faraj Rahho was kidnapped last Friday in Mosul after three of his companions were killed in a shootout.

The prime minister's office said Mr. Maliki has ordered the interior minister and security officials in Nineveh province to closely follow the case and make every effort to free the archbishop.

Some information for this report was provided by AFP, AP and Reuters.