The number of non-EU migrants in Calais has grown to around 15,000. Many, by their own admission, hope to make the illegal move to Britain.
Former President Nicolas Sarkozy has been hauled in for questioning, and France is suddenly in uncharted territory.
French police plan to crackdown on improvised camps as the port attracts scores of migrants hoping to smuggle themselves across to the UK.
President Nicolas Sarkozy has made an impassioned plea for five more years at a final rally before the first round of voting.
A huge hall in Nice is packed with 10,000 supporters awaiting Sarkozy's arrival. Bad poll numbers haven't dampened enthusiasm.
Mme Sarkozy is making a rare appearance on the campaign trail with her husband. There are huge shouts of 'Carla, Carla.'
French police are investigating why the mother of pupil stabbed a teacher in front of her class.
Dozens of offices attended the Edouard Herriot school in Albi, where the 34-year-old teacher was leading a class of five and six-year-olds in the school.
The mother of a pupil has stabbed a teacher to death in front of her class in France.
The 34-year-old teacher was leading a class of five and six-year-olds in the school in Albi, southern France when the mother attacked on Friday morning.
French president Francois Hollande described the killing at the Edouard Herriot pre-school as an "abominable drama".
Mr Hollande has sent the education minister to the region in response to the incident.
As former French president Nicholas Sarcozy is released from detention by French authorities, he denies any wrongdoing and says the country's justice system has been 'politicised', reports Europe Editor James Mates
Former French President Nicolas Sarkozy has denied any wrongdoing and says he has not "betrayed" his country after being put under formal investigation for corruption.
Mr Sarkozy told Europe 1 radio the country's legal system was "being used for political means".
"The situation is sufficiently serious to tell the French people where we stand on the political exploitation of part of the legal system today," he said.
He added: "I say to all those who are listening or watching that I have never betrayed them and have never committed an act against the Republic's principles and the rule of law."
One of the allies of Nicolas Sarkozy has expressed doubts over the fairness and impartiality of one of the magistrates investigating the ex-French president over allegations of corruption.
"I question the impartiality of one of the judges," Christian Estrosi, the mayor of the southern city of Nice told France Info radio, accusing Hollande's government of having whipped up "an atmosphere of hate".
Former French President Nicholas Sarkozy has been placed under formal investigation by investigators after a hearing late on Tuesday night.
.As ITV News Europe Editor James Mates reports, this is one level below an official charge.
Fmr Pres #Sarkozy placed under formal investigation early today for influence peddling, corruption. 1 level below being officially charged.
Under French law, when a suspect is placed under formal investigation, he or she is then examined by a judge, who determines whether there is sufficient evidence for the suspect to be charged.
Former French President Nicolas Sarkozy has been escorted by police to a hearing before a judge in relation to allegations of corruption, influence-peddling and the "breach of professional secrets".
Mr Sarkozy has not been charged but he is now under "formal investigation", as are his lawyer and a judge suspected of being connected to the allegations.
Former French President Nicolas Sarkozy is under formal investigation relating to allegations of corruption.
He is suspected of influence peddling, corruption and benefiting from "the breach of professional secrets," Reuters reports the prosecutor's office as saying.
Mr Sarkozy was earlier held for questions over suspicions he received leaked details of an inquiry into alleged irregularities in his 2007 election campaign
He and his lawyer appeared before a judge on Tuesday evening before being released in the early hours of the morning.
The investigation may be a major blow to his hopes of returning to front-line French politics following his defeat to Francois Hollande in the 2012 presidential election.