A woman was killed waiting outside a shuttered shelter in Kyiv during a Russian missile barrage, calling into question the poor state of Ukraine's air-raid shelters

• An inspection has found nearly a quarter of Ukraine's air-raid shelters are locked or unusable.
• A Kyiv woman waiting at a locked shelter was hit by falling missile fragments, her husband said.

An inspection has found that nearly a quarter of Ukraine's air-raid shelters are locked or unusable, officials said on Saturday, AP reported.

Out of the "over 4,800" shelters, the Ukrainian interior ministry said it had inspected, 252 were locked and a 893 were "unfit for use."

A criminal probe has also begun after a 33-year-old woman in Kyiv died while waiting outside a closed shelter during a Russian missile barrage on Thursday, according to the Kyiv regional prosecutor's office.

Falling missile fragments struck the woman, her husband told Ukrainian media, per AP.

The Kyiv regional prosecutor's office said that a security guard who had failed to unlock the doors had been arrested and that three others had been put under house arrest.

Those arrested face up to eight years in prison for official negligence leading to a person's death, AP reported.

Kyiv mayor Vitali Klitschko also said on Telegram on Saturday that authorities have received "more than a thousand" complaints about "locked, dilapidated or insufficient" air-raid shelters within one day of launching an online feedback portal.

He said that "almost half" of the complaints were about locked facilities, and about a quarter were to do with them being in poor condition.

The interior ministry said that over 5,300 volunteers would continue to inspect shelters across Ukraine.

Russia has increased the bombardment of Ukraine in recent weeks, firing hypersonic and cruise missiles and killer drones.

The Kremlin launched at least 563 missiles and Iranian-manufactured explosive drones at Ukraine in May.