The Afghan government and the Taliban were not immediately available to comment on the UN report
At least 3,812 Afghan civilians were killed or wounded in the first half of 2019 in the war against Islamist militant groups, including a large increase in the number of casualties caused by government and Nato-led troops, a UN report said on Tuesday.
The latest casualty figures were released as talks between the Taliban and US officials to end the 18-year Afghan war entered an important stage, with US negotiators aiming to reach a peace deal before September 1.
However, the war has raged on despite such diplomatic efforts, forcing civilians to live under the constant threat of being targeted by militants or being caught up in ground fighting, or becoming inadvertent victims of air strikes by Afghan government and Nato-led forces.
The UN Assistance Mission in Afghanistan (Unama) said in its latest report ground raids and clashes caused the most civilian casualties, followed by the use of homemade bombs and air strikes.
Taliban and Islamic State fighters killed 531 Afghans and wounded 1,437 between January 1 and June 30. The hardline Islamist groups deliberately targeted 985 civilians, including government officials, tribal elders, aid workers, and religious scholars, the Unama report said.
It said pro-government forces killed 717 Afghans and wounded 680 in the six months to June 30, a 31% increase from the corresponding period in 2018.
At least 144 women and 327 children were killed and more than 1,000 wounded across the country.
Air strikes caused 519 civilian casualties, 150 of whom were children.
"Parties to the conflict may give differing explanations for recent trends, each designed to justify their own military tactics," Unama human rights chief Richard Bennett said.
"The fact remains that only a determined effort to avoid civilian harm, not just by abiding by international humanitarian law but also by reducing the intensity of the fighting, will decrease the suffering of civilian Afghans," he said.
The United States and other Nato troops are stationed in Afghanistan as part of a mission to train, assist and advise Afghan forces and to carry out counter-terrorism operations.
Washington is trying to negotiate a deal under which foreign forces would pull out in return for security guarantees by the Taliban, including a pledge that the country will not become a safe haven for terror groups.
The Taliban control or contest half the country, more than at any time since being overthrown by the US-led Afghan forces in late 2001, but have rejected calls for a ceasefire until all foreign forces leave Afghanistan.
The Afghan government and the Taliban were not immediately available to comment on the UN report.