Story highlights Doctors Without Borders will evacuate its staff from six hospitals in northern Yemen

Humanitarian group cites "indiscriminate bombings"

Saudi Arabia says it will investigate incidents, according to media reports

(CNN) Saudi Arabia is expressing its regret over the decision by Doctors Without Borders to pull its staff out of six hospitals in northern Yemen.

The humanitarian group, also known as Médecins Sans Frontier, or MSF, said it had no other option.

The group blames the Saudi-led coalition force for carrying out "indiscriminate bombings," and it complains about "unreliable assurances" from the Saudi government, especially after the suspension of peace talks between the coalition and the Houthi forces in Kuwait earlier this month.

"Over the last eight months, MSF has met with high-ranking Saudi-led coalition officials on two occasions in Riyadh to secure humanitarian and medical assistance for Yemenis, as well as to seek assurances that attacks on hospitals would end," the organization said on its website.

It cites a recent incident on August 15, when 19 people were killed and 24 wounded after an airstrike hit a hospital in northern Yemen

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