KABUL, Afghanistan  — An Afghan police commander opened fire Friday on two Associated Press journalists inside a security forces base in eastern Afghanistan, killing prize-winning photographer Anja Niedringhaus and wounding veteran correspondent Kathy Gannon.

Niedringhaus, 48, who had covered conflict zones from the Balkans in the 1990s to Iraq, Libya and Afghanistan and was part of a team of AP photographers who won the Pulitzer Prize in 2005, died instantly of her wounds.

Gannon, who for many years was the news organization’s Afghanistan bureau chief and currently is a special correspondent for the region, was shot three times in the wrists and shoulder. After surgery, she was in stable condition and spoke to medical personnel before being flown to Kabul.

“Anja was a vibrant, dynamic journalist well-loved for her insightful photographs, her warm heart and joy for life. We are heartbroken at her loss,” said AP Executive Editor Kathleen Carroll, speaking in New York.