This article is more than 5 years old

This article is more than 5 years old

The Pentagon’s inspector general is investigating an allegation that the US military command overseeing the anti-Islamic State campaign distorted or altered intelligence assessments to exaggerate progress against the militant group, a defense official said on Wednesday.

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The official was not authorized to discuss the investigation publicly and so spoke on condition of anonymity.

The investigation was first disclosed by the New York Times. The paper reported that it began after at least one civilian Defense Intelligence Agency analyst told authorities that he had evidence that officials at US Central Command were improperly reworking conclusions of assessments prepared for policymakers, including President Barack Obama.

Details of the allegations were not available. A spokeswoman for the inspector general’s office, Bridget Serchak, declined to comment.

The Pentagon press secretary, Peter Cook, said he could not confirm the investigation. The Pentagon typically does not publicly comment on the work of the inspector general’s office, which is an independent arm of the Defense Department.

Cook said the defense secretary, Ash Carter, “counts on independent intelligence and analysis from a variety of sources to help him make critical decisions about the nation’s security”.

A Pentagon spokesman, Captain Jeff Davis, said Pentagon and Central Command officials have been publicly candid about the difficulty of the war against the Islamic State. At times, however, they have painted a rosier picture than was reflected by developments on the ground.

On 15 May, for example, Brigadier General Thomas Weidley, who at the time was chief of staff to the military headquarters running the war, told reporters that the Islamic State was “losing and remains on the defensive”. Even as he spoke, Iraqi officials were saying that Isis fighters had captured the main government compound in Ramadi, the capital of Anbar province. Two days later the city fell, marking a significant victory for Isis and a setback for the US and Iraq.

Colonel Patrick Ryder, a spokesman for Central Command, said he could not discuss ongoing investigations.

“The [inspector general] has a responsibility to investigate all allegations made and we welcome and support their independent oversight,” Ryder said.

Ryder said the government’s numerous intelligence agencies routinely produce a wide range of “subjective assessments related to the current security environment”, and that it is customary for agencies to comment on others’ draft assessments.

“However, it is ultimately up to the primary agency or organization whether or not they incorporate any recommended changes or additions. Further, the multi-source nature of our assessment process purposely guards against any single report or opinion unduly influencing leaders and decision-makers,” Ryder said.