Haqqani network behind Kabul bombing: US

The US believes the Afghan Taliban-allied Haqqani network was responsible for the ambulance bomb in Kabul, that killed more than 100 people on Saturday.

President Donald Trump has ruled out negotiations with the Taliban after deadly attacks in Kabul. (AAP)

The United States is confident that the Afghan Taliban-allied Haqqani network was behind the ambulance bomb in the capital, Kabul, that killed more than 100 people, a spokesman for the US-led coalition has told Reuters.

"We are very confident the Taliban Haqqani network was behind the killing of more than 103 people this past Saturday," said Captain Tom Gresback, a US military spokesman for the NATO-led Resolute Support mission in Afghanistan.

Another US official, speaking on condition of anonymity, also said the US believed the attack was the work of the Haqqani network, which Washington has long said has safe haven in neighbouring Pakistan.