LONDON — Princess Anne has been hospitalized after an accident thought to involve a horse left her with a concussion, further straining Britain’s royal family as health problems continue to limit public appearances by King Charles III and the Princess of Wales.

The king’s 73-year-old sister was admitted to the hospital as a precautionary measure and is expected to make a full recovery. She was injured Sunday while walking at her Gatcombe Park estate in southwestern England, Buckingham Palace said Monday.

The cause of Anne’s injuries wasn’t clear, but doctors said her injuries were consistent with an impact from a horse’s head or legs.

“The king has been kept closely informed and joins the whole royal family in sending his fondest love and well-wishes to the princess for a speedy recovery,” the palace said in a statement.

The accident is the latest health scare to hit the House of Windsor in recent months, with Charles and Prince William’s wife, Kate, undergoing treatment for cancer. That has strained the royal family’s ability to keep up a full slate of public appearances, with Anne and Queen Camilla taking on more engagements.

Anne, in particular, will be missed as she was the hardest-working member of the royal family last year. Known for her businesslike approach to a busy schedule of public appearances, Anne took part in 457 royal engagements last year, compared with 425 for the king, 172 for William and 123 for Kate, according to statistics compiled by the Daily Telegraph newspaper.

As a result of her injuries, Anne was forced to cancel her appearance at a state dinner Tuesday in honor of the emperor of Japan, as well as a trip to Canada planned for later in the week.

Hunger in Gaza: An influx of aid appears to have eased a hunger crisis in northern Gaza for now, but the entire territory remains at “high risk” of famine after Israel’s offensive in Rafah caused displacement and the disruption of aid operations in the south, a draft report said Monday.

The report by the leading international authority on the severity of hunger crises said nearly everyone in Gaza is struggling to get enough food and that more than 495,000 people, or greater than a fifth of the population of 2.3 million, are expected to experience the highest level of starvation in the coming months.

That’s despite months of U.S. pressure on Israel to do more to facilitate aid efforts, the installation of a $230 million U.S.-built pier that has been beset by problems, and repeated airdrops by multiple countries that aid agencies say are insufficient to meet vital needs.

The war has destroyed most of Gaza’s capacity to produce its own food.

The latest findings come from the Integrated Food Security Phase Classification, an initiative set up in 2004 during the famine in Somalia that now includes more than a dozen U.N. agencies, aid groups, governments and other bodies. The Associated Press obtained a draft of its latest report, the final version of which is set to be released Tuesday.

Kenyan cops deploy to Haiti: Hundreds of Kenyan police officers were leaving Monday for Haiti, where they will lead a multinational force against the powerful gangs whose deadly violence spiked this year and helped bring about a change in government.

The deployment is controversial. The government of Kenyan President William Ruto is defying a court’s ruling calling it unconstitutional. And critics have expressed concern about the long history of alleged abuses by police.

The 400 police officers are the first of the 1,000 that Kenya expects to send for the United Nations-led force in Haiti. Ruto’s sendoff ceremony was closed to the media, but his office shared a speech in which he urged them to uphold integrity.

More than 2,500 people were killed or injured in the first three months of the year in Haiti.

US aid to Ukraine: The U.S. is expected to announce Tuesday that it is sending an additional $150 million in critically needed munitions to Ukraine, as Russia accuses Ukraine of using U.S.- provided munitions to strike inside Russia or Russian-held territory, according to two U.S. officials speaking on the condition of anonymity to provide details that had not yet been made public.

Russia summoned the American ambassador Monday to protest what it says was the use of U.S.-made advanced missiles in a Ukrainian attack Sunday on Crimea that reportedly killed four people and wounded more than 150.

Crimea, which Russia seized from Ukraine in 2014 in a move that most of the world rejected as unlawful, long had been declared a fair target for Ukraine by its Western allies.

The continued flow of U.S. munitions, which will be drawn from existing stockpiles, is intended to help Ukrainian forces repel intensified Russian attacks.

Fatal fire at SKorea factory: A fire likely sparked by exploding lithium batteries swept through a manufacturing factory Monday near South Korea’s capital, killing 22 mostly Chinese migrant workers and injuring eight, officials said.

The fire began after batteries exploded while workers were examining and packaging them on the second floor of the factory in Hwaseong city, just south of Seoul, around 10:30 a.m., fire officials said, citing a witness. They said they would investigate the cause of the blaze.

In the past few decades, many people from China, including ethnic Koreans, have migrated to South Korea to seek jobs. Like other foreign migrants from Southeast Asian nations, they often end up in factories or in physically demanding and low-paying jobs shunned by more affluent South Koreans.

Authorities said they would investigate whether fire extinguishing systems were at the site and if they worked.

Trash balloons fly again: North Korea resumed launches Monday night of balloons likely carrying trash toward South Korea, South Korea’s military said, in the latest round of a Cold War-style campaign on the Korean Peninsula.

The launches came days after North Korean leader Kim Jong Un and Russian President Vladimir Putin signed a major defense deal that observers worry could embolden Kim to direct more provocations at South Korea.

The statement asked South Korean citizens not to touch North Korean balloons and report them to military and police authorities. The military didn’t say how it would respond to new balloon launches.

Starting in late May, North Korea launched more than 1,000 balloons that dropped manure, cigarette butts, scraps of cloth, waste batteries and vinyl in various parts of South Korea. North Korea said its balloon campaign was a tit-for-tat action against South Korean activists who used balloons to fly political leaflets critical of its leadership across the border.