KYIV, Ukraine (AP) — Russian jet-powered drones struck a home in northern Ukraine on Friday, killing a 29-year-old woman and her 9-year-old son, officials said.The strike came a day after the United Nations said July was the deadliest month for Ukrainian civilians since the weeks following Moscow’s all-out invasion of its neighbor more than four years ago.At least 437 civilians were killed and 2,610 wounded last month, the U.N. monitoring mission in Kyiv said, as Russia escalated its bombing of Ukrainian towns and cities. That was 70% higher than in July last year and 30% up on June of this year.Overall, since Russia’s invasion on Feb. 24, 2022, U.N. human rights monitors say the war has killed at least 16,874 civilians, including 820 children, and wounded 51,273, including 3,126 children.“Every month this year the number of killed and injured civilians has increased. That trend accelerated sharply in July,” said Danielle Bell, head of the U.N. human rights monitoring mission in Kyiv. “The number of civilian casualties in July was the highest we documented in a single month since March 2022.”The Russian strike in northern Ukraine’s Sumy region early Friday also wounded four other people, including the dead boy’s father and grandmother, who were hospitalized with severe burns, the regional military administration chief Oleh Hryhorov said.