DONETSK, Ukraine - Four people were killed when a hospital in east Ukraine was shelled Wednesday ahead of a visit to Kiev by US Secretary of State John Kerry that will focus on the possibility of arming Ukrainian forces.
The latest deaths came as international pressure grew for an immediate halt to surging violence that has seen hundreds of civilians killed in recent weeks as pro-Russian rebels pushed into government-held territory.
President Petro Poroshenko said the events of recent days should encourage NATO to "provide more support to Ukraine, including the provision of modern weapons to protect itself and defend itself against the aggressor".
"We need a strong army with new weapons, this will help us to defend the civilian population against attacks by terrorists," he told German newspaper Die Welt.
Hours before Kerry was due to arrive in Kiev, US President Barack Obama's nominee for defence secretary said he was likely to support providing Ukraine with weapons.
Ashton Carter, expected to be confirmed soon as Pentagon chief, told a US Senate committee that "we need to support the Ukrainians in defending themselves".
However, Vice President Joe Biden seemed less hawkish, telling German newspaper Sueddeutsche Zeitung: "We have said since the beginning that there is no military solution to this crisis." Wednesday's violence occurred at a hospital in a western suburb of the rebel stronghold of Donetsk, where an AFP journalist saw a body lying next to the crater from a mortar blast that caused extensive damage to the building.
Two more dead civilians were sprawled outside a nearby residential building, and a local resident said another elderly man was killed in his home.
Eight other civilians were killed in clashes around the region in a 24-hour period, rebel and government officials said, and the army said four soldiers died and 25 were wounded.
EU foreign affairs head Federica Mogherini called for an immediate ceasefire to allow civilians to escape the fighting.
"The spiral of ever-increasing violence in eastern Ukraine needs to stop," Mogherini said.
Observers from the Organisation for Security and Co-operation in Europe have demanded a "local temporary truce" around the battleground town of Debaltseve for the next three days.
Amnesty International said Debaltseve's population had dropped from 25,000 to 7,000 in just a few days.
The strategic railway hub between Donetsk and another rebel centre, Lugansk, has been the focus of the fiercest fighting for a week as rebels battle to encircle Ukrainian forces.
Officials say thousands of civilians have fled the beleaguered town over recent days and those remaining behind were trapped in basements without water or electricity.
"The bombardment is incessant. We are trying to bring in medication and evacuate civilians under enemy fire," Illya Kiva, an official from Ukraine's interior ministry, told AFP from Debaltseve.
Ukraine's military said rebels had launched a fierce infantry attack on the town overnight Tuesday but been beaten back after a five-hour battle.