This from The Age:

US forces have sealed off a house in the northern city of Mosul where eight suspected al-Qaeda members died in a gunfight – some by their own hand to avoid capture.

A US official said that efforts were under way to determine if terror leader Abu Musab al-Zarqawi was among the dead.

[…]

American soldiers maintained control of the site, imposing extraordinary security measures, a day after a fierce gunbattle that broke out when Iraqi police and US soldiers surrounded a house after reports that al-Qaeda in Iraq members were inside.

Three insurgents detonated explosives and killed themselves to avoid capture, Iraqi officials said. Eleven Americans were wounded, according to the US military.

Update: White House spokesman Trent Duffy: “‘highly unlikely, not credible.”