US Secretary of State Mike Pompeo arrived in Kabul on Monday for his first visit to Afghanistan since becoming secretary of state.

US Secretary of State Mike Pompeo met with Afghan President Ashraf Ghani and was scheduled to meet with US forces in Afghanistan before leaving the country.

At a news conference alongside Ghani, US Secretary of State said he had come to Afghanistan to learn of the progress made since President Donald Trump announced his strategy for the region last August.

Pompeo said the strategy is "working" and sent a "clear message" to Taliban that the group cannot wait out the departure of the United States.

Pompeo's trip to Afghanistan  also comes just days after the death of a U.S. service member, Cpl. Joseph Maciel of South Gate, California, in what the U.S. Defense Department called an "apparent insider attack.

"Maciel, who was the third U.S. service member to be killed in Afghanistan this year, was deployed in February as part of Trump's South Asia strategy.

Two other U.S. soldiers also were wounded in the attack.