Prosecutors have called on the National Court to release two puppeteers whose arrest for allegedly praising terrorism in a show last week has raised considerable controversy in Spain.

The prosecutors' office said Wednesday the two should be released but ordered to appear before court daily while the investigation continues.

The puppeteers were detained without bail Friday for using a sign saying "Long Live Alka ETA," in a word-play reference to Spain's armed Basque group ETA and al-Qaida. Praising terrorism has been a crime in Spain since 1995.

The satirical theater piece also featured the hanging of a judge in effigy and police beatings, prompting parents attending with children to complain.

The acting conservative government backed the arrests but critics say the arrests are an attack on the freedom of speech.