WASHINGTON, Aug. 11 (Xinhua) -- The U.S. and Ukrainian presidents agreed on Monday that any Russian intervention in Ukraine without Kiev's consent would be "unacceptable" and a violation of international law.
U.S. President Barack Obama spoke with his Ukrainian counterpart Petro Poroshenko about the ongoing crisis in eastern Ukraine, the White House said in a statement.
Obama expressed his strong support for Ukraine's sovereignty and territorial integrity while Poroshenko talked about the continued shelling of Ukraine's territory from Russia, according to the statement.
Poroshenko updated Obama on his engagement with the International Committee of the Red Cross (ICRC) to deliver multilateral humanitarian aid to the distressed populations in eastern Ukraine.
Noting the urgency of such humanitarian efforts, Obama encouraged Poroshenko to continue to exercise restraint and caution in military operations in order to avoid civilian casualties, said the statement.
Russia and Ukraine have agreed on details of a humanitarian relief operation under the aegis of the ICRC in southeast Ukraine, Russian Foreign Minister Sergei Lavrov said Monday.
Russia is sending a humanitarian convoy to Ukraine in collaboration with representatives of the ICRC, Russian President Vladimir Putin told European Commission President Jose Manuel Barroso on Monday.