Mr Stoltenberg confirmed that he had accepted the position.
On Wednesday, NATO leaders are meeting in Washington to discuss the alliance’s support for Ukraine in the war against Russia.
Police quickly arrested a 39-year-old man in connection with the incident.
At the moment, NATO itself is not officially providing any lethal aid to Ukraine’s defensive war against Russia’s invasion of its territory.
Russia warned Finland and Sweden against joining NATO with ambiguous threats of retaliation; however, Mr Kristersson detailed no major concern.
“This morning we will also be briefed about the horrendous terrorist attacks against Israel over the weekend by Hamas.”
It is the fourth time Mr Stoltenberg’s mandate as NATO secretary general has been extended.
Mr Stoltenberg praised the raising of the Finish flag for the first time at the alliance headquarters in Belgium.
NATO promised more arms and equipment for Ukraine to help restore power supplies cut by Russian strikes.
The alliance Secretary General Jens Stoltenberg believes that “The Russian armed forces retain significant capabilities as well as a large number of troops.”
