Bersih chairperson Maria Chin Abdullah's lawyer Ambiga Sreenevasan is urging police to allow access to her client before Tuesday's habeas corpus hearing.
Ambiga said Maria's lawyer and family members have not been allowed to see her since last Sunday.
"Please give us access to Maria for instructions on legal matters before her case on Tuesday.
"Have been trying to no avail," she said in a tweet to inspector-general of police Khalid Abu Bakar.