U.S. military spokesman Col. Sonny Leggett said in a tweet that the "defensive" strike was the first U.S. attack against the militants in 11 days. He said the attack was to counter a Taliban assault on Afghan government forces in Nahr-e Saraj in the southern Helmand province.

Leggett added that Taliban forces had conducted 43 attacks on Afghan troops on Tuesday in Helmand.

Leggett called on the Taliban to stop the attacks and uphold their commitments based on the agreement signed on Feb. 29 between their leaders and U.S. peace envoy Zalmay Khalilzad in Doha, Qatar, which lays out a conditions-based path to the withdrawal of American forces from Afghanistan.

President Donald Trump confirmed Tuesday that he spoke on the phone to a Taliban leader, making him the first U.S. president believed to have ever spoken directly with the militant group responsible for the deaths of thousands of U.S. troops in nearly 19 years of fighting in Afghanistan.

The Afghan Defense Ministry said in another statement on Wednesday that a Taliban attack on a checkpoint in northern Kunduz province had killed seven of its soldiers.

The statement said that ten Taliban fighters were killed in the shoot-out.

The Taliban have not claimed responsibility for any of these attacks so far or commented on the U.S. airstrike Wednesday.

However, Taliban spokesman Zabihullah Mujahid told The Associated Press Wednesday that a week of reduction in violence that started midnight on Feb. 21 had ended.

Leggett said that U.S. forces are responsible for defending their Afghan allies according to agreements between U.S. and Afghan governments.