DUBAI, United Arab Emirates (AP) — The daughter of a long-detained human rights activist in Bahrain said Monday she has been diagnosed with Hodgkin lymphoma, and again called for her father’s release.

Maryam al-Khawaja, who holds citizenship in both Bahrain and Denmark, appealed to the Danish government to take stronger action in securing the release of her father, 62-year-old activist Abdulhadi al-Khawaja. She also called on Denmark to stop selling weapons to Israel and to advocate for a ceasefire in the ongoing conflict between Israel and Hamas in Gaza.

In a statement, the speaker urges the Danish government to uphold their human rights values by using their diplomatic influence to secure the release of her father and put an end to all weapon sales. She also calls for a ceasefire in Gaza, stating that only then will all families be able to reunite safely.

Bahrain, an island kingdom in the Persian Gulf that is home to the U.S. Navy’s 5th Fleet, did not immediately respond to a request for comment.

Abdulhadi, the father of Al-Khawaja, has been imprisoned for several years on charges that have received international criticism. These charges are related to his involvement in leading the 2011 Arab Spring protests in Bahrain. Last year, Al-Khawaja was prevented from traveling to Bahrain with other human rights activists to protest against his ongoing detention.

Hodgkin lymphoma is a cancer of the lymph nodes. While aggressive, it can be successfully treated. Al-Khawaja said she was already undergoing chemotherapy to fight the disease.