"The past behavior of North Korea, it's clear to us that they would not just use the possession of nuclear weapons as a deterrent".
He said North Korea won't halt its nuclear and missile programs "while it feels a direct threat to its security" and urged practical steps to de-escalate the situation, including cancellation of planned new U.S.
Tillerson voiced his and the White House's concerns about North Korea, while also seeming to outline a new approach to the country.
But Tillerson also reiterated that communication channels with the US remain open and that "North Korea knows they're open, they know where the door is, they know where to walk through that door when they want to talk".
"Unfortunately, we do not see any progress from the USA administration", he said.
It's unclear how USA officials would set up the talks with North Korea.
Earlier in the day, US President Donald Trump said that he would like to have his Russian counterpart President Vladimir Putin's help in resolving the crisis in North Korea.
"We will, in the meantime, keep our channels of communication open".
The chief United States negotiator for North Korea said yesterday that the USA should engage in direct diplomacy with Pyongyang alongside sanctions imposed over its nuclear programme. "We'd like to have Russia's help, very important", Trump told reporters when asked about his phone call with the Russian president on Thursday.
The council meeting was joined by North Korean Ambassador to the U.N. Ja Song-nam.
North Korea's United Nations. ambassador Ja Song-Nam made a rare appearance at the council meeting. chaired by Japan, which announced new targeted sanctions on Chinese entities, among others.
In his briefing to Friday's meeting, U.N. Secretary-General Antonio Guterres offered his "good offices" to avoid the dispute over the "alarming and accelerated pace" of North Korea's nuclear and missile program accidentally escalation into conflict.
Singling out China, Pyongyang's sole ally, and Russia, Tillerson urged Beijing and Moscow to take unilateral steps that go beyond the current tough United Nations sanctions resolutions.
Mr Tillerson said Pyongyang had to carry out a "sustained cessation" of weapons testing before any talks.
South Korea's Vice Foreign Minister Cho Hyun told the council that North Korea is "in the final stages of nuclear weaponization" and warned that if it can put a nuclear warhead on an intercontinental ballistic missile "it will fundamentally alter the security landscape in the region and beyond".