French fighter jets struck Islamic State positions in Syria after Friday’s coordinated attacks in Paris that killed more than 130 people.
Islamic State claimed responsibility for the suicide bombings and shootings.
The attacks reignited a row over Europe’s refugee crisis and drawn calls to block a huge influx of Muslim asylum seekers, Reuters reports.
French police have launched an international hunt for a Belgian-born man they believe helped organise the assaults with two of his brothers.
One of the brothers died in the attacks while the second one is under arrest in Belgium, a judicial source said.
A further two French suicide attackers have been identified, police said, while the identity of four other assailants, who all died in the violence, was still under review.
France has been bombing Islamic State positions in Iraq and Syria for months as part of a US-led operation.
After Friday’s carnage, Paris vowed to destroy the group.
Underlining its resolve, French jets on Sunday launched their biggest raids in Syria to date, hitting its stronghold in Raqqa.
“The raid … including 10 fighter jets, was launched simultaneously from the United Arab Emirates and Jordan. Twenty bombs were dropped,” the defense ministry said.
Among the targets were a munitions depot and training camp, it said.
There was no word on casualties or the damage inflicted.
The investigation into Friday’s attacks, the worst atrocity in France since World War II, led swiftly to Belgium after police discovered that two of the cars used by the Islamist militants had been rented in the Brussels region.
By Sunday, Belgian officials said they had arrested seven people in Brussels but one of the people who had hired the cars slipped through the fingers of the police.
He was pulled over on the French-Belgian border on Saturday but later released.
Police named the man they were seeking as Salah Abdeslam, saying the 26-year-old was “dangerous”.
Although he was born in Brussels, French authorities said he was a French national.
“The abject attacks that hit us on Friday were prepared abroad and mobilised a team in Belgium that benefited … from help in France,” French Interior Minister Bernard Cazeneuve told reporters after meeting his Belgian counterpart in Paris.
Stunned by the carnage, thousands of people thronged to makeshift memorials at four of the sites where the attacks took place, laying flowers and lighting candles to remember the dead.
“We are living a nightmare,” said Caroline Pallut, whose 37-year-old cousin Maud Serrault died when gunmen attacked the Bataclan concert hall, killing at least 89 people — the bloodiest single incident on Friday night.
“It is all so senseless. She had only just got married.”
The death toll rose to 132, with three more people dying on Sunday from their wounds.
Police have identified 103 dead including many young people and many foreigners, out relaxing on a Friday night in one of the world’s most visited cities.
In a sign that at least one gunman might have escaped, a source close to the investigation said a Seat car believed to have been used by the attackers had been found in the eastern Paris suburb of Montreuil with three Kalashnikov rifles inside.
Police have formally named just one of the attackers — Ismael Omar Mostefai, 29, from Chartres, southwest of Paris.
He was identified by the print from one of his fingers that was severed when his suicide vest exploded.
French media named the two other French assailants as Bilal Hadfi and Ibrahim Abdeslam.
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