France's President Francois Hollande will travel to both Washington and Moscow next week to coordinate the fight against ISIS, the countries' governments announced on Tuesday.
Also on Tuesday, Russia's Vladimir Putin held talks with Hollande aimed at boosting coordination of their military actions over Syria, the Kremlin's website reported.
"A French Navy group headed by an aircraft carrier will soon approach your area of operations," Putin said, according to the Kremlin statement. "We must establish direct contact with the French and work with them as allies."
The French premier will be will be traveling to Moscow for talks on Nov. 26.
In a statement, the White House said Hollande's visit to Washington on Nov. 24 "will underscore the friendship and solidarity between the United States and France, our oldest ally."
The statement added: "President Obama and President Hollande will consult and coordinate our efforts to assist France's investigation into these attacks, discuss further cooperation as part of the 65-member counter-ISIL coalition, and reiterate our shared determination to confront the scourge of terrorism."
Secretary of State John Kerry met with Hollande on Tuesday as France was emerging from three days of national mourning.
Hollande called the Paris attacks that killed nearly 130 an "act of war" and vowed a "merciless" response. He also launched bombing raids on ISIS heartland in Syria after the attacks, and asked for a state of emergency declared on the night of the massacre to be extended to three months.
He has also said 5,000 police and military posts, 2,500 judicial posts and 1,000 border posts would be created in France within the next two years.