The US-led coalition fighting against Isis in Syria and Iraq admitted to killing at least 1,114 civilians in air and artillery strikes in the four-year span of the war.

Inherent Resolve, the codename for the US-dominated coalition combating the jihadi group, said it had launched a total of 30,008 strikes on suspected Isis targets between August 2014 and August 2018, and that each allegation of civilian casualties has been investigated.

It is a significant number but far less than the more than 6,000 people assessed to have been killed by independent monitors.

“We continue to employ thorough and deliberate targeting and strike processes to minimise the impact of our operations on civilian populations and infrastructure,” said a press release issued by the Pentagon. “This process includes thorough review and vetting of each target package prior to a strike, and another review after that strike.”

While contending that the number of civilian casualties is far higher, critics praised the US military for improving its measures of accountability. “While that number remains far below public estimates of harm we have seen significant improvements in how the coalition monitors battlefield casualties which we hope will be standard practice in future conflicts,” Chris Woods, director of the UK-based war monitoring organisation Airwars, said in a statement.

Airwars estimates at least 6,500 civilians killed.

Other critics say the US does far too little to assess the impact of its bombs, and continues to undercount unintentional deaths. “The first problem is that they do not do proper investigations,” Donatella Rovera, a senior researcher for Amnesty International, told The Independent. “They go to Iraq, Syria, Raqqa and go around to talk to their partners. They do not talk to survivors and witnesses.”

Syria bombings: US, UK and French military air strikes wreckage Show all 13 1 /13 Syria bombings: US, UK and French military air strikes wreckage Syria bombings: US, UK and French military air strikes wreckage The wreckage of the Scientific Studies and Research Centre in the Barzeh district, north of Damascus, which was targeted by the US, UK and France air strikes. AFP/Getty Syria bombings: US, UK and French military air strikes wreckage A Syrian soldier films the damage of the Syrian Scientific Research Center surrounded by papers and rubble. AP Syria bombings: US, UK and French military air strikes wreckage Firefighrers extinguish smoke that rises from the damage. The Pentagon says none of the missiles filed by the U.S. and its allies was deflected by Syrian air defenses, rebutting claims by the Russian and Syrian governments. AP Syria bombings: US, UK and French military air strikes wreckage The wreckage of part of the Scientific Studies and Research Centre compound . AFP/Getty Syria bombings: US, UK and French military air strikes wreckage Part of a building collapsing, surrounded by the wreckage. AFP/Getty Syria bombings: US, UK and French military air strikes wreckage Further damaged to the Scientific Studies and Research Centre compound. AFP/Getty Syria bombings: US, UK and French military air strikes wreckage Lt. Gen. Kenneth McKenzie, the director of the Joint Staff at the Pentagon, also says there also is no indication that Russian air defense systems were employed early Saturday in Syria. AP Syria bombings: US, UK and French military air strikes wreckage A Syrian soldier sprays water on the wreckage. AFP/Getty Syria bombings: US, UK and French military air strikes wreckage Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, "destroying a building that included scientific labs and a training centre". AFP/Getty Syria bombings: US, UK and French military air strikes wreckage A Syrian soldier films the damage. AP Syria bombings: US, UK and French military air strikes wreckage Damage to the Scientific Research Center building that was hit by the strikes. EPA Syria bombings: US, UK and French military air strikes wreckage The Scientific Studies and Research Centre was one of the targeted buildings by the US, UK and France. AFP/Getty Syria bombings: US, UK and French military air strikes wreckage Further damage to the centre. EPA

Ms Rovera also said the US military has also repeatedly and loudly dismissed the findings of independent groups such as Amnesty or Human Rights Watch, or media outlets, only to quietly admit mistakes months later.

“No organisation will ever have the resources to investigate every case where the coalition bombed a building in Syria or Iraq,” she said. “They should be doing that. The problem is that they are not doing that.”

Even as the US has gotten better about admitting civilian casualties, other countries bombing Syria or Iraq continue to ignore the impact of their warfare on noncombatants or deny any problems. Russia, which claims it is fighting extremists on behalf of Syrian government, has inflicted well-documented carnage on civilians, including rescue workers and medical personnel, as documented repeatedly by the United Nations, but has never admitted any to civilian casualties.

Mr Woods also said the UK and France “continue to claim low or no casualties from their own actions, an absurdity given the lethal nature of modern urban warfare”.

Refusing to admit civilian casualties prevents governments from assessing their methods, and identifying flaws in their collection of intelligence and designating of targets, said Ms Rovera.