An Italian judge could decide today to make Silvio Berlusconi the first head of a government to testify in criminal proceedings over secret CIA transfers of terrorism suspects.

Judge Oscar Magi is expected to announce his decision on whether to call Berlusconi and other politicians when he resumes a trial today against 26 Americans and seven Italians accused of carrying out a transfer or "rendition" in 2003.

Prosecutors say a CIA-led team kidnapped a Muslim cleric off the streets of Milan and secretly flew him to Egypt.