KYIV, Aug 25 - Russian President Vladimir Putin ordered a major buildup of his country’s military forces Thursday in an apparent effort to replenish troops that have suffered heavy losses in six months of bloody warfare and prepare for a long, grinding fight ahead in Ukraine.

The move to increase the number of troops by 137,000, or 13%, to 1.15 million by the end of the year, The Associated Press reported.

Putin’s decree did not specify whether the expansion would be accomplished by widening the draft, recruiting more volunteers, or both. But some Russian military analysts predicted heavier reliance on volunteers because of the Kremlin’s concerns about a potential domestic backlash from an expanded draft.

The move will boost Russia’s armed forces overall to 2.04 million, including the 1.15 million troops.

Western estimates of Russian dead in the Ukraine war have ranged from more than 15,000 to over 20,000 — more than the Soviet Union lost during its 10-year war in Afghanistan. The Pentagon said last week that as many as 80,000 Russian troops have been killed or wounded, eroding Moscow’s ability to conduct big offensives.

The Kremlin has said that only volunteer contract soldiers take part in the Ukraine war. But it may be difficult to find more willing soldiers, and military analysts said the planned troop levels may still be insufficient to sustain operations.

Retired Russian Col. Retired Viktor Murakhovsky said in comments carried by the Moscow-based RBC online news outlet that the Kremlin will probably try to keep relying on volunteers, and he predicted that will account for the bulk of the increase.

Elsewhere on the battle front, the deadly strike on the train station in Chaplyne, a town of about 3,500 in the central Dnipropetrovsk region, came as Ukraine was bracing for attacks tied to the national holiday and the war’s six-month mark, both of which fell on Wednesday.

The deputy head of the Ukrainian presidential office, Kyrylo Tymoshenko, did not say whether all of the 25 people killed were civilians. If they were, it would amount to one of the deadliest attacks on civilians in weeks. Thirty-one people were reported wounded.

Witnesses said some of the victims, including at least one child, burned to death in train cars or passing automobiles.

“Everything sank into dust,” said Olena Budnyk, a 65-year-old Chaplyne
resident. “There was a dust storm. We couldn’t see anything. We didn’t know where to run.”

The dead included an 11-year-old boy found under the rubble of a house and a 6-year-old killed in a car fire near the train station, authorities said.

Russia’s Defense Ministry said its forces used an Iskander missile to strike a military train carrying Ukrainian troops and equipment to the front line in eastern Ukraine. The ministry claimed more than 200 reservists “were destroyed on their way to the combat zone.”

The attack served as a painful reminder of Russia’s continued ability to inflict large-scale suffering. Wednesday’s national holiday celebrated Ukraine’s 1991 declaration of independence from the Soviet Union.

In April, a Russian missile attack on a train station in the eastern Ukrainian city of Kramatorsk killed more than 50 people as crowds of mostly women and children sought to flee the fighting. The attack was denounced as a war crime. (ap/ez)