( CNN ) -- Hours after being released from custody , the daughter of a prominent Bahraini human rights activist was feared to be detained again early Sunday , her family said . Zainab al-Khawaja called her mother Sunday morning , telling her in a brief conversation that she was at a Manama police station and asking for a lawyer to be sent there , the woman 's husband , Wafi Almajed , told CNN around 2:30 a.m. Sunday ( 7:30 p.m . ET Saturday ) . The call was the first her family had heard from her in hours since she went to the military hospital where her father , Abdulhadi al-Khawaja , is receiving care while he is on a prolonged hunger strike . Abdulhadi al-Khawaja is protesting the life sentence he received for his role in the anti-government unrest that continues to embroil his country . Sunday marks the 60th day of his hunger strike . The Bahrain Center for Human Rights -- a group Abdulhadi al-Khawaja founded -- said the man had recently called his family , saying he had been mistreated by guards and hospital staff . According to the group , he 'd threatened his guards that he would stop drinking water , in addition to continuing his hunger strike , unless his treatment improved . Zainab al-Khawaja went to the military hospital Saturday , to try to see her father , the rights group said . Her attempted visit was her second in three days and came just hours after she was released from custody for entering a restricted area in her first attempt Thursday . Her first attempt came after seeing a picture of her father with no shirt -- looking thin and frail since his detention . Zainab al-Khawaja said she ran to the Interior Ministry complex where he was then being held and called out his name . The Interior Ministry said she was arrested Thursday night for being in a restricted area `` in which standing is prohibited . '' The ministry also said she `` attacked an on-duty public employee . '' She was released Saturday . Mohammed Al Jishi , lawyer for both father and daughter , expressed concerns that Abdulhadi al-Khawaja could soon die . However , Bahrain government spokesman Abdul-Aziz al Khalifa told CNN Saturday that al-Khawaja was receiving `` the utmost care that is available '' and was seen `` very recently '' by international human rights organizations . `` Mr. al-Khawaja is in stable care . He has been provided the best medical care , '' al Khalifa said , adding that the hunger striker has been observed around the clock by three doctors -- one , Danish -- for the past three weeks . Al-Khawaja lived in Denmark and holds Danish citizenship . His family learned Friday that , on that same day , al-Khawaja was being moved to a military hospital because his condition was deteriorating , Al Jishi said . Al Khalifa said al-Khawaja 's appeal is scheduled for April 23 and he will get his day in court then . Meanwhile , Bahrain 's foreign minister said he has received a written message from his Danish counterpart requesting a transfer for Abdulhadi al-Khawaja to Denmark . Bahraini authorities said they were examining the request . Al-Khawaja was arrested last April for his role in anti-government demonstrations in February and March . In June , he and seven other Shiite opposition activists were found guilty of plotting to overthrow the country 's Sunni royal family . The Interior Ministry 's general inspector said that `` all policies and procedures of the prison facilities in Bahrain meet international human rights standards , and all detainees have consistent and reliable access to professional medical care , '' according to a statement from Maj. Gen. Tariq H. Al Hasan , a spokesman for the ministry . On March 30 , the government reported that Abdulhadi al-Khawaja had low blood pressure and was taken to Bahrain Defense Force Hospital , where he was treated and returned to Jau Prison the following day . Records showed that al-Khawaja had lost about 10 kilograms ( 22 pounds ) and had a low hemoglobin level , though not critically low , the government said . He was also reportedly taking fluids , mineral supplements , glucose and juice on a daily basis . Demonstrators and Bahraini authorities have continued to clash in recent months , with the opposition accusing the government of using heavy-handed tactics .
NEW : Abdulhadi al-Khawaja daughter is at a police station and asked for a lawyer , her husband says . NEW : She was previously released from custody on 60 days . She was trying to visit her father , Al-Khawaja , on a hunger strike for Saturday . Abdulhadi al-Khawaja , a rights advocate , got a life sentence for his role in anti-government unrest .