Ukraine's national police have released bodycam footage that they say shows the moments between two powerful Russian bomb strikes that killed at least 40 people at a humanitarian aid centre and a shelter in the south of the country.

The video, recorded by a camera worn by one of the police officers who was killed, shows residents of the village of Kamyshuvakha making their way into an underground shelter after the first attack on Monday. Moments later a blast is heard and flames can be seen as the shelter is struck.

President Volodymyr Zelensky said more than 30 people could still be buried under the rubble, with a search operation continuing for a third day. According to Ukraine, nine glide bombs, some weighing 3,000kg, hit the village as people had gathered to collect humanitarian aid.

The bodycam footage, made public on Wednesday, shows the scale of the destruction after the first bomb struck the village in the Zaporizhzhia region. Stunned residents are seen staring at the rubble, and several badly damaged buildings are visible.

At one point, the voice of a military official is heard over a two-way radio warning police on the ground that more glide bombs had been launched towards Kamyshuvakha.

"Quickly [go] to the shelter!" one of the officers tells local residents, who are shown walking into the shelter, located at least two floors underground. Seconds later the shelter is hit and the recording stops.

Ukraine said the shelter was close to a local school that was being used to hand out humanitarian aid. BBC Verify confirmed that the video was filmed in the same place as footage released by the Ukrainian state emergencies service, DSNS, showing the aftermath of Monday's attack.

Writing on social media on Wednesday, Zelensky said that "nine aerial bombs were dropped by the Russians." He added: "First, they hit people who came to receive humanitarian aid, and then rescuers and police officers who arrived at the scene."

The Ukrainian leader also said that "unfortunately, there has been very little reaction from the world to this insane attack," describing it as another of the "thousands" of war crimes committed by Russia. The DSNS had earlier posted a separate video showing a huge crater left by the strike. Russia's military has not publicly commented on the incident.

Russian President Vladimir Putin ordered a full-scale invasion of Ukraine in February 2022.