Photo courtesy of the BBC
The two men from Mali, who were renovating a house in Versailles, were arrested this week for having false residency papers.
They have now been released but could face prosecution or deportation.
Mr Sarkozy, who became president in May, has a reputation for being tough on illegal migrants.
He has promised to deport thousands of people without residency papers in 2007. Sarkozy illegal immigrant probe (more)
Mark Alexander