NATO chief Jens Stoltenberg said the Western military alliance was concerned Russia may be preparing a pretext to use chemical weapons. “We see the rhetoric and we see that Russia is trying to create some kind of pretext accusing Ukraine, the United States and NATO allies of preparing to use chemical and biological weapons,” he told reporters after a NATO summit in Brussels. “Our top military commander … has activated NATO’s chemical, biological, radiological and nuclear defense elements and allies are deploying additional chemical and biological and nuclear defenses,” he said. He reiterated the significant impact any use of chemical weapons would have on the course of events, not just in Ukraine, but also in neighboring countries. He also stressed the continuity of NATO’s Open Door policy, which has been one of Moscow’s main complaints and justifications for its invasion of Ukraine. Asked whether NATO would provide Ukraine with the list of weapons and equipment requested by Ukrainian President Volodymyr Zelenskyy, Stoltenberg said that alliance members are already supplying weapons and equipment, but “at the same time, we have a responsibility to prevent this conflict from becoming a full-fledged war in Europe.”Stoltenberg said that the alliance will increase its support for Ukraine as well as its deployments in Eastern Europe during a press conference that came after an emergency session of NATO member-state leaders. Stoltenberg’s comments coincided with the release of a statement from the alliance as well as the announcement that he will stay on for an extra year due to the invasion, delaying his plan to step down from the position.NATO members are “equipping Ukraine with significant military supplies including anti-tank and air defense systems and drones, which are proving highly effective, as well as substantial financial and humanitarian aid,” Stoltenberg said. “Today we agreed to do more, including cyber security assistance and equipment to help Ukraine protect against biological, chemical, radiological and nuclear threats,” he added. The NATO chief warned against escalating the war and pledged more support for other countries facing threats from Russia, namely Georgia and Bosnia.The Ukrainian Foreign Ministry released a statement on Thursday claiming that Russian forces have “forcibly deported about 6,000 Mariupol residents to Russian filtration camps.” It said that Russia is also trying to do the same to the 15,000 residents in the Left Bank region of the city. “The Russian occupiers are forcing them to move to Russia. The invaders confiscate people’s passports and other identity documents,” the statement said, adding that it was “in order to use them as hostages and put more political pressure on Ukraine.” The statement also accused Russian forces of firing on columns of civilians fleeing from the city that was the subject of intense bombardment by the Russian military and a siege that left thousands of people without access to food, water and power for days.Ukrainian President Volodymyr Zelenskyy called on NATO to provide “unrestricted” military aid while speaking to representatives of the alliance over video-link. “To save people and our cities, Ukraine needs military assistance without restrictions. In the same way that Russia is using its full arsenal without restrictions against us,” he said. He thanked the members of the alliance for the support they have already provided, but said it was not enough. “You can give us one percent of all your planes. One percent of your tanks. One percent!” During the call, Zelenskyy also accused Russia of using phosphorus weapons — which ignite in contact with air and can burn for a long time as well as causing severe burns on people it comes into contact with. “This morning, by the way, phosphorus bombs were used. Russian phosphorus bombs. Adults were killed again and children were killed again,” Zelensky said. “The Alliance can once more prevent the death of Ukrainians from Russian strikes, from Russian occupation, by giving us all the weapons we need.”