SHYROKYNE, April 27 (AFP) - With gunfire crackling in the distance, soldiers on Ukraine's eastern frontline say there has been little let-up in fighting since Russia pulled back its troops from their country's borders.

"Unfortunately we're still feeling this escalation," said Stanislav Shukh, a 35-year-old Ukrainian soldier in Shyrokyne in southern Ukraine.

War-scarred facades line abandoned streets in the former resort town, which is a key position for Ukrainian soldiers in their conflict with pro-Russia separatists.

A recent uptick in fighting between the two sides saw Russia mass tens of thousands of troops on Ukraine's borders and leaders in Moscow, Washington, and European capitals trade accusations of fuelling the escalation.

The separatists are widely seen as having Russia's political and military backing, which Moscow denies.

The Kremlin said last week it had withdrawn troops but Ukrainian soldiers dug in at Shyrokyne say they are on alert and the atmosphere is still tense.

"Some Russian troops did leave territory near our border, but all their equipment - which can be very easily moved for an escalation - remained," Shukh added.

Shyrokyne on the Azov Sea was abandoned by residents and nearly completely destroyed in fighting that broke out in 2014 after Moscow annexed the Crimean peninsula, spurring harsh condemnations and sanctions from the West.

The conflict has claimed more than 13,000 lives and the fresh fighting that intensified at the beginning of the year shredded hopes that a ceasefire brokered in July might wind down the fighting completely.

Some 30 Ukrainian soldiers have been killed since the start of the year compared to 50 in all of 2020, while the separatists have reported at least 20 military deaths since January.

On Tuesday, another Ukrainian soldier was killed and three more injured when their vehicle hit an explosive device, officials in Kiev said.