A spokesman says the United Nations is assessing security in the wake of an explosion in New York’s Chelsea district as the organization prepares to host world leaders arriving for the General Assembly.

U.N. Spokesman Stephane Dujarric said Sunday that security inside the complex “is being assessed on a constant basis.”

He pointed out that security outside the U.N. is the responsibility of the host country.

“We receive great cooperation and appreciate the support from the federal authorities and the NYPD throughout the year, and especially during the General Assembly to keep staff, delegates and visitors safe,” Dujarric said.

Twenty-nine people were injured in the Saturday night blast. They have been treated and released from a hospital.

(AP)