EU members are set to meet Tuesday to consider new sanctions on Moscow.
Kerry voiced his "strong concern" as violence between Kiev and separatists flared.
Lavrov referred to people wearing black uniforms with no identification.
Sergey Lavrov had implied the U.S. was pulling the strings in Ukraine.
The crisis between Ukraine and Russia appeared to escalate further on Tuesday as Russia warned Kiev...
Kerry and his Russian counterpart discussed on Sunday deescalating the crisis, Kerry said.
Kerry is eager to salvage last-ditch attempt at political settlement he's championing.
The U.N. says the jet's downing may be a war crime, but the crash site is inaccessible.
It will be the first such face-to-face since Ukraine's election.
Kerry said the Kremlin-funded Russia Today is a "propaganda bullhorn."
The foreign minister said Kiev's operations follow visits from U.S. leaders.
The two diplomats huddled for nearly four hours on Sunday.
The Secretary of state is flying to Paris, signaling talks with Russian Foreign Minister.
We’ll give you three guesses on what Secretary of State John Kerry gave a senior Russian official...