Story highlights The Australian couple worked at a clinic in Burkina Faso

Authorities in Burkina Faso and neighboring Niger helped secure her freedom

(CNN) An Australian woman kidnapped by militants in Burkina Faso last month has been released, but her husband is still missing, relatives said Sunday.

Jocelyn Elliott and her husband, Dr. Ken Elliott, were seized by al Qaeda-linked militants on January 15.

The couple worked at a clinic in the northern town of Djibo, near the border with Mali. They provided surgical services in Burkina Faso for more than four decades, according to relatives.

Authorities in Burkina Faso and neighboring Niger helped secure her freedom, her family said in a statement through Australia's Department of Foreign Affairs.

"The Elliott family are deeply grateful for the safe release of our mother, Jocelyn," the statement said. "We wish to convey our great appreciation to authorities in Niger and Burkina Faso for their support and assistance."

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