Barring any major developments that concludes the live blogging for today.
Latest from our news desk:
Russian Foreign Minister Sergei Lavrov says Moscow is ready to agree to allowing additional international observers in eastern Ukraine to be armed with pistols.
The Organization for Security and Cooperation in Europe has said it wants to send an armed police mission to eastern Ukraine to ensure that local elections can take place in a secure atmosphere.
The 2015 Minsk accord on resolving the conflict in the region between Russia-backed separatists and Ukrainian forces calls for elections to be held there.
In an interview on state TV on June 4, Lavrov said Russia agrees OSCE monitors along the conflict line and at weapons storage sites should "have the right to carry personal guns [and]...pistols for self-defense."
More on the Ukraine border arrest from our news desk:
The Ukrainian Border Guard has confirmed a media report that a Frenchman with a cache of weapons and explosions to be used allegedly in a planned attack in France was arrested on the Ukrainian-Polish border in late May.
French broadcaster M6 reported on June 3 that the 25-year-old was arrested by Ukrainian border guards with an arsenal of weapons and explosives including rocket launchers and Kalashnikov assault rifles in his vehicle.
A spokesman for the Ukrainian Border Guard, Oleh Slobodyan, on June 4 confirmed the arrest.
A spokeswoman for Ukraine's SBU security service declined to comment.
According to Reuters, the man is still being held by Ukrainian authorities pending a possible extradition request from Paris.
The M6 report said he was planning an attack in Paris, although few other details were provided.
Security officials in Europe are on high alert after gunmen killed 130 in Paris in November last year and suicide bombers blew themselves up at Brussels airport and on the metro in March, killing 32.
Main news this morning:
The United States is dispatching an envoy to Paris and Berlin on June 7 and 8 to try to convince European allies "of the importance of maintaining sanctions pressure on Russia," the U.S. Treasury said on June 3.
The Treasury's Acting Under Secretary for Terrorism and Financial Intelligence Adam J. Szubin will meet with senior government officials from European foreign, financial, and economic ministries, as well as private European banks and financial institutions.
Besides urging allies to keep sanctions on Moscow until its "fulfills the provisions of the Minsk Agreements" outlining a path to peace in Ukraine, Szubin will discuss implementation of the Iran nuclear deal and "continued U.S. efforts to combat Iran's support for terrorism and other destabilizing activity," the Treasury said.