At a meeting of NATO members in Brussels on Thursday, U.S. Secretary of Defense Jim Mattis ruled out any military collaboration between the United States and Russia, saying current conditions were not ideal.
"We are not in a position right now to collaborate on a military level," Mattis said at a news conference at NATO headquarters. "But our political leaders will engage and try to find common ground."
Relations between the two countries have reached their lowest point since the Cold War because of Moscow's alleged meddling in last year's U.S. elections and its continued aggressive actions in Ukraine.
Mattis said that before any military cooperation could take place with Russia, it would have to “prove itself” able to comply with international law.
Mattis made his comments after Russian Defense Minister Sergei Shoigu said Moscow was "ready to restore cooperation with the Pentagon."
U.S. President Donald Trump praised Russian leader Vladimir Putin during the U.S. presidential campaign and has done so since taking office.
And although the U.S. ceased cooperating with Russia in 2014 after it annexed Crimea from Ukraine, Trump has expressed interest in working with Russia again on issues of common interest, such as the fight against Islamic State.
Mattis said Thursday that he did not think the fight against IS would end quickly, but he added the U.S. would like to speed up the multinational campaign against the militant group.
When asked about possibly sending U.S. ground troops into Syria, Mattis said he had not had enough time in office to form a plan and wanted to confer with allies before moving forward.
Top officials meet
Meanwhile, U.S. Joint Chiefs Chairman General Joseph Dunford met with his Russian counterpart, General Valeriy Gerasimov, in Azerbaijan on Thursday to discuss the status of U.S.-Russia military relations.
Chairman of the U.S. Joint Chiefs of Staff Gen. Joseph Dunford meets with Army Gen. Valeriy Gerasimov, Russia’s chief of the General Staff of the Armed Forces and first deputy minister of defense, in Baku, Azerbaijan, Feb. 16, 2017. (Photo - U.S. Department of Defense)
The Pentagon issued a statement after the meeting, saying the two countries agreed to "enhance communications" and "improve operational safety of military activities" to prevent crises and "avoid the risk of unintended incidents."
On the diplomatic front, U.S. Secretary of State Rex Tillerson met in Germany with Russian Foreign Minister Sergei Lavrov for the first time and said afterward that Washington could collaborate with Moscow under certain circumstances.
"As we search for new common ground, we expect Russia to honor its commitment to the Minsk agreements and work to de-escalate violence in the Ukraine," Tillerson said in Bonn, where foreign ministers of the G-20 nations are meeting.
Under the 2015 Minsk agreement, Ukraine, Russia and Russia-backed separatists agreed to end the crisis in Ukraine, beginning with the withdrawal of heavy weapons.
On Wednesday, Ukrainian Foreign Minister Pavlo Klimkin told VOA that he expected the White House and European allies to continue pressuring Russia on its commitments.
"I absolutely expect that the U.S. will play a more proactive role, along with our European partners, in pressuring Russia to fulfill their obligation according to the Minsk agreement," Klimkin said, adding that Ukrainian President Petro Poroshenko was scheduled to meet with U.S. Vice President Mike Pence on Saturday.
"We've had a lot of communication, cooperation and coordination [with the White House], and we are very happy about it. We had a strong message from United States Ambassador to the United Nations Nikki Haley," he added, referring to Haley's recent condemnation of Russian aggression in eastern Ukraine. "Now we're hearing it from the new administration. It's all part of our efforts to build practical and logical cooperation with the U.S."
U.S. Secretary of State Rex Tillerson, left, Russia's Foreign Minister Sergei Lavrov, right, and others wait for the start of a meeting at the World Conference Center, in Bonn, Germany, Feb. 16, 2017, as part of a broader G-20 meeting.
Earlier this week, Trump accepted the resignation of newly appointed national security adviser Michael Flynn following reports that Flynn had misled the administration about conversations he had with Russian Ambassador Sergei Kislyak.
Several U.S. investigations are underway into alleged interference by Russian intelligence services in favor of Trump during last year's U.S. presidential election.
Putin reaches out
Putin, meanwhile, called for a restoration of ties Thursday between U.S. and Russian intelligence agencies to work on common problems.
"Restoring dialogue with the special services of the United States and other NATO members is in our mutual interest," Putin said in a televised speech before Russia's Federal Security Service.
Tillerson is attending his first G-20 meeting, hosted by German Foreign Minister Sigmar Gabriel, who has been a vocal critic of some of Trump's policies.
The G-20 countries account for about 85 percent of the world economy and two-thirds of the global population.
The Bonn meeting is a precursor to a G-20 summit scheduled for July in Hamburg in what may be the first time Trump meets Putin in person.
Myroslava Gongadze of VOA's Ukrainian service contributed to this report.