Athens - More than 4,000 inmates at 21 prisons across Greece continued a hunger strike for the second week on Tuesday, with some sewing their mouths shut to protest overcrowding, drug dealing and lengthy pre-trial detention periods.

Some 4,800 inmates, including Athens' top-security Korydallos prison and the Alikarnassos prison on the Mediterranean island of Crete, initially launched the strike on November 3.

The detainees have been drinking juice and water but have refused solid food.

Reports said 19 inmates at a prison in central Greece sewed their mouths shut to drive their point home while inmates at a woman's prison have refused to drink water during their hunger strike.

Aside from the inmates on hunger strike, another 4,000 continued to boycott their prison's mess halls for a second week to protest the poor conditions at dentention centers across the country.

Protesters, whose cause has been backed by the Coalition of the Radical Left (SYRIZA) and other left-wing parties, object to overcrowding and are demanding better jail conditions, including proper medical care and restrictions on the time that detainees awaiting trial must spend behind bars.

They also object to the drug dealing that goes in many prisons.

A group called Initiative for Prisoners' Rights condemned the state for the drug-related death of an inmate in a jail on the Aegean island of Chios.

"People who are addicted to drugs do not belong in prison but in rehabilitation centers," the group was quoted by the Greek daily Kathimerini as saying.

Last week Justice Minister Sotiris Hatzigakis announced a number of reforms aimed at improving conditions for inmates and offering additonal support for the rehabilitation of drug addicts, who comprise a large proportion of inmates in Greek prisons.

According to the Council of Europe, detainees in Greece have to wait an average of 12 months in pre-trial detention before they go to trial, nearly three times that of other European Union states.

Prisoners are also demanding that social and political leaders be granted easier access to prisons.

Greece's prisons are among the most overcrowded in Europe with 10,983 inmates crammed into jails designed to hold just 7,543. (dpa)