Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State John Kerry expressed concern after North Korea conducted its fifth nuclear test on Friday.
Lavrov told reporters while meeting Kerry in Geneva to discuss Syria peace efforts that a message must be sent "very strongly" on implementing U.N. resolutions on North Korea. Kerry said he expected President Barack Obama to address the issue on Friday and said there would be discussions at the United Nations.
"We're trying to monitor to precisely find out what took place," Kerry said.
