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A passenger walks past a TV screen broadcasting a news report on North Korea's long range rocket launch at a railway station in Seoul, South Korea, Feb. 7, 2016. Kim Hong-ji/Reuters

The United Nations Security Council began an emergency meeting Sunday on North Korea's rocket launch, and diplomats said they expected the 15-nation body to condemn Pyongyang and redouble efforts to agree on new sanctions.

Speaking to reporters ahead of the closed-door session, France's U.N. ambassador, François Delattre, described North Korea’s launch of a long-range rocket on Sunday as an “outrageous provocation.”

“That's why weakness is not an option,” he said. Asked about plans for a Security Council resolution to impose sanctions following a North Korean nuclear test last month, Delattre said: “The sooner the better, the firmer the better.”

British Foreign Secretary Philip Hammond said Sunday he had spoken with his Japanese counterpart, Fumio Kishida, and both had agreed the council should take strong action against North Korea.

Council diplomats said they expected the body to issue a unanimous statement of condemnation. They said that, in the coming days and weeks, Beijing and Washington would continue bilateral discussions on the outline of a new resolution to expand existing U.N. sanctions on North Korea.

Speaking on condition of anonymity, a senior Western diplomat said he hoped the council would be able to vote on a new sanctions resolution this month.

He said the Americans had been pushing for tough new measures that went beyond targeting North Korea's atomic weapons and missile programs, while China wanted any future steps to focus on the question of nonproliferation.

One diplomat told Reuters Washington was hoping to tighten international restrictions on North Korea's banking system while Beijing was reluctant to support that for fear of worsening conditions in its impoverished neighbor.

“There will eventually be a sanctions resolution,” the diplomat said. “China wants any steps to be measured but it wants the council to send a clear message to DPRK [North Korea] that it must comply with council resolutions.”

China expressed regret over the launch and called on all sides to act cautiously and refrain from steps that might raise tension. China is North Korea’s main ally but it disapproves of its nuclear weapons program.

Chinese Ambassador Liu Jieyi declined to comment when entering the council session, saying only that he was working with the council.

U.N. Secretary-General Ban Ki-moon Saturday condemned the rocket launch and urged North Korea to “halt its provocative actions.”

Pyongyang has been under U.N. sanctions because of its nuclear weapons program since it first tested an atomic device in 2006.