A 29-year-old woman who had confessed to killing her young son, and was later found to be mentallly ill, has been ordered to remain under police custody until her case is closed.

Although she was to be put into a mental hospital, she was subsequently transferred to the Interior Ministry Hospital.

Daniela Terziiska has admitted strangling three-year-old Petar - whose death on March 16 prompted a massive anti-government rally by taxi drivers who thought he had been murdered by strangers.

Sofia City Court has been awaiting a conclusion on the state of Terziiska's mental health from a seven-strong team of psychiatrists and psychologists from the Forensic Psychiatric and Psychological Clinic in Sofia.

On Thursday they returned the verdict that she was suffering from a form of schizophrenia - which precludes her from prosecution.

Sofia City Prosecutor General Valeri Parvanov said on Friday: "There is sufficient proof that Daniela Terziiska killed her child. We will propose today to Sofia City Court that she be sent to a mental institution."

However, on Saturday - by order of the Sofia City Prosecution Service - Terziiska was transferred from the Forensic Psychiatric and Psychological Clinic in Sofia to the Interior Ministry Hospital on the grounds that she could be a danger to herself or someone else.

Reni Tsanova, one of her lawyers, met Parvanov on Friday. She said afterwards: "Daniela Terziiska has been used. Even if she did commit the murder, someone else forced her to do it."

On Monday, Terziiska's lawyers laid a request for her to be released before Sofia City Court, arguing that she should no longer be kept in police custody now she had been pronounced mentally ill.

A few hours before Terziiska was transferred from the clinic on Saturday, her husband Stoyan and other close relatives met her for the first time since the court session on March 19. He said: "She looked much worse than before the murder happened."