KABUL, Afghanistan (AP) — Anti- Taliban raids by Afghan forces backed by US airstrikes killed at least 40 civilians attending a wedding party in the southern Helmand province, Afghan officials said. The civilian deaths in Sunday night’s raids on Taliban hideouts further rattled Afghanistan amid an upsurge in violence that followed the collapse this month of US-Taliban peace talks to end America’s longest war.

“We are saddened and devastated to hear that civilians have lost their lives in an incident in Helmand despite President Ghani’s repeated call for extra cautions in conducting military operations,” said Sediq Sediqqi, President Ashraf Ghani’s spokesman.

He added that Helmand’s provincial governor has been instructed to send an investigation team to the area. Abdul Majed Akhund, deputy provincial councilman, said most of the dead were women and children who were at a wedding ceremony in Musa Qala district.

An additional 12 civilians were wounded and were hospitalised in Lashkar Gah, the capital of Helmand province, Akhund said. The civilian deaths occurred during the second of two raids undertaken in different areas of Musa Qala, Attahullah Afghan, head of the provincial council, said.

The operations killed 22 Taliban fighters, including foreigners, Afghanistan’s defence ministry said in a statement. Fourteen people were arrested, including five Pakistani nationals and one Bangladeshi. The statement said a large warehouse of supplies and equipment was also destroyed.

“The foreign terrorist group was actively engaged in organising terrorist attacks,” the statement said. The raids came after a drone attack last week in eastern Afghanistan’s Nangarhar province blamed on US forces killed at least 16 and wounded tens of others, most of them civilians.

US forces said that attack was targeting Islamic State militants. Also, in an insider attack at the Kandahar airport yesterday, a policeman turned his weapon on a NATO Resolute Support convoy, according to a statement tweeted by a spokesman for US forces in Afghanistan.

Resolute Support forces returned fire, killing the attacker, the statement tweeted by spokesman Col Sonny Leggett said. Three Resolute Support service members suffered non-life-threatening injuries, the statement said. The violence comes as Afghanistan prepares for presidential elections on Saturday, a vote the Taliban vehemently opposes.

The Taliban are at their strongest since their ouster in 2001 and hold sway over more than half the country, staging near-daily, deadly attacks across Afghanistan. The insurgent group has warned Afghans not to vote in the election and said their fighters would target election campaigns as well as polling stations.