Al-Qaeda Iraq leader 'arrested'

Masri is believed to have formed al-Qaeda's first cell in Baghdad
The leader of al-Qaeda in Iraq
Abu Ayyub al-Masri
has been arrested
according to media reports quoting the country's defence ministry.
Masri

also known as Abu Hamza al-Muhajir

was detained in the northern Iraqi city of Mosul

the reports said.
The US military in Iraq said it was currently looking into the reports.
The Egyptian-born militant took over the leadership of the group from Abu Musab al-Zarqawi shortly after he was killed in a US air strike in June 2006.
Masri is believed to have helped Zarqawi form the first al-Qaeda cell in Baghdad following the US-led invasion in 2003.
After becoming leader

he vowed to "continue what Sheikh Abu Musab began" and avenge his death with attacks that would "turn your children's hair white".
In April 2007

he was named "minister of war" in the 10-man cabinet of the Islamic State of Iraq

an umbrella organisation of Sunni militant groups.
Shortly afterwards

the Iraqi government claimed Masri had been killed in an "internal battle" between militants

but this was quickly denied by the group. In an hour-long audio tape broadcast last month

he purportedly called for renewed attacks on US troops and noted the recent announcement that 4

000 had died in Iraq. "We must celebrate this event in our special way

and make the defeated Bush join us in this celebration

" he said.