CNN  — 

President Barack Obama will huddle with dozens of world leaders involved in battling ISIS during next week’s Nuclear Security Summit in Washington, a person involved in the planning indicated said Friday.

The summit, meant to strengthen security measures around nuclear weapons, brings together more than 50 delegations to the U.S. capital, many of which play a role in the anti-ISIS coalition.

France, Belgium, the United Kingdom and Turkey are all expected to be represented. Turkish Prime Minister Recep Tayyip Erdogan – under scrutiny for his efforts in stemming the flow of foreign fighters to Europe – is also expected to attend.

READ: Pentagon: ISIS finance minister killed

Focus of the special session is expected to include the issue of foreign fighters, as well as discussion on preventing ISIS from obtaining chemical or radiological weapons.

Planning for the session began earlier this year, before the terror attacks in Brussels but after the Paris and San Bernardino shootings.

The anti-ISIS meeting was first reported by the Washington Post.