The Swiss pharmaceuticals company is being investigated by Greek authorities over allegations of bribery towards public officials in the 2006-2015 period.
Retired senior judge Panagiotis Pikrammenos, who served as caretaker prime minister in the period between May 2012 and June 2012 before being succeeded by Antonis Samaras, said on Monday he and the cabinet he presided over had not been involved in any way in the scandal.
Samaras accused the current prime minister, Alexis Tsipras, of slander on Monday.
