By Katie Williams, live reporter

Russia’s invasion of Ukraine sparked a humanitarian crisis, with millions of people near frontlines displaced and forced to flee their homes.

The United Nations said an escalation in military activity and major incidents in the first six months of this year – including the destruction of the Kakhovka Dam in early June – has “deteriorated the already dire situation” in the country.

At least five aid workers were killed in the line of duty over this period, compared with four deaths recorded in all of 2022, the UN said.

And though humanitarian organisations have reached millions with vital aid and protection services, it warned a lack of funding is “hampering” operations.

This chart shows how many people the organisation’s humanitarian affairs office estimates were in need, how many had been targeted and those that had been reached by the end of June:

A large proportion of people provided with humanitarian aid are in regions to the east of Ukraine, where fighting is concentrated. The Dnipro region has seen the highest number of people provided with vital supplies – nearly 816,000.

In its latest report on the humanitarian response in Ukraine, the UN said five million people had received health services and three million had access to clean water and hygiene products at the end of June.

Around one million children who fled their homes and whose schools are not fully open had received education support, it added.

This shows a breakdown of care provided to people in need by type of aid:

The UN said access to Russian-controlled areas continues to be “extremely challenging” despite “extensive efforts”, with just 4% of people reached living in these regions.

Funding is also “urgently required” to continue humanitarian operations in Ukraine, the organisation warned, adding that the funding received by aid organisations at the end of June was below 30% of what had been requested.

“International support will be critical to ensure that humanitarians in Ukraine can help people whose lives have been upended by this war,” said the UN.