Here is a map of today's military situation in the Donbas region issued by Ukraine's National Security and Defense Council (click image to enlarge):
We are now closing the live blog for today. Until we resume tomorrow morning, you can follow all our ongoing Ukraine coverage here.
Good morning. We'll start the live blog today with this item from our news desk on the situation regarding Nadiya Savchenko:
Sergei Naryshkin, the speaker of the State Duma, Russia's lower house of parliament, told reporters in Strasbourg that the decision whether to free detained Ukrainian pilot Nadiya Savchenko would be made by a Russian court.
Speaking on January 25 after a meeting with Anne Brasseur, the president of the Parliamentary Assembly of the Council of Europe (PACE), Naryshkin said Savchenko "is accused of involvement in a serious crime -- the killing of two Russian journalists."
Naryshkin said, "Only an investigation, and the court can establish guilt; and if guilt is not proven, then she [Savchenko] will be freed."
On January 21, it was reported that Brasseur had appealed to Naryshkin to secure the release of Savchenko so she could attend the opening session of PACE on January 26.
Savchenko was captured by pro-Russian separatists in eastern Ukraine last June, then transferred to Russian custody the next month.
In October, Savchenko won a seat in Ukraine's parliament as a candidate from Ukrainian politician Yulia Tymoshenko's Batkivshchyna party. The following month, Tymoshenko announced Savchenko would be one of Ukraine's representatives in PACE.
(TASS, Interfax)
The latest wrap from our news desk on Obama's comments and the latest Ukrainian offensive:
U.S. President Barack Obama says the United States is considering all options short of military action to turn up the pressure on Russia after Moscow-backed separatists launched a new offensive in eastern Ukraine.
Obama spoke in New Delhi on January 25, a day after rocket attacks blamed on the rebels killed 30 people and wounded dozens more in the strategic Donetsk region port city of Mariupol.
Obama said he would "look at all additional options that are available to us short of military confrontation and try to address this issue. And we will be in close consultation with our international partners, particularly European partners."
The European Union called an emergency meeting of its foreign ministers on January 29 to discuss the situation.
The United States and EU have imposed sanctions on Russia over its seizure of Crimea from Ukraine last March and its support for the separatists who hold parts of the Donetsk and Luhansk regions.
The rocket attacks on Mariupol came a day after the senior separatist leader in Donetsk said rebels would seek to take control of the entire province and would no longer initiate peace talks with Kyiv.
The conflict has killed 5,000 people since April.
The United Nations said on January 23 that at least 262 had been killed in the previous nine days, making it the deadliest period since a 12-point peace plan including a cease-fire was agreed in the Belarusian capital, Minsk, on September 5.
Fighting continued on January 26, with the Ukrainian military saying at least seven of its soldiers had been killed and 24 wounded in the previous 24 hours.
Military spokesman Vladyslav Seleznyov said rebels had fired on government positions or other targets more than 100 times.
Seleznyov said fighting was at its most intense around the town of Debaltseve, a key road junction between Donetsk and Luhansk that the rebels have vowed to encircle.
The separatist offensive came despite an agreement reached by the foreign ministers of Russia, Ukraine, Germany, and France on January 21 for government troops and the rebels to pull heavy weapons back from a separation line established under the Minsk deal.
Ukraine held a day of mourning on January 25 after the Mariupol attack, which President Petro Poroshenko called a "crime againt humanity."
Obama blamed "separatists with Russian backing, Russian equipment, Russian financing, Russian training and Russian troops" for the escalation of the situation in eastern Ukraine.
Latvian Foreign Minister Edgars Rinkevics tweeted that the attack on Mariupol "breached the Minsk agreements," and added: "Russia [is] fully responsible to stop them, if not more isolation & sanctions to come."
Donald Tusk, the former Polish prime minister who is now president of the European Council, used language recalling the eve of World War Two that conveyed both fierce condemnation of Russian President Vladimir Putin and criticism of recent EU talk of easing sanctions against Moscow.
"Once again, appeasement encourages the aggressor to greater acts of violence. Time to step up our policy based on cold facts, not illusions," Tusk said on Twitter after a telephone conversation with Poroshenko following the Mariupol attack.
German Chancellor Merkel called the attack on Mariupol "a clear and totally unjustifiable violation of the cease-fire" in telephone calls with the presidents of Ukraine and Russia on January 25, and asked Putin to prevent further escalation.
Ambassadors to the Ogranzation for Security and Cooperation in Europe were to hold a special meeting in Vienna on January 26 to discuss the need for further peace consultations between representatives of Ukraine, Russia, the OSCE, and the other signatories of the Minsk agreement -- a reference to the Russian-backed rebels.