CAIRO, Feb 23 (Reuters) - Egyptian liberal opposition politician Mohamed ElBaradei called on Saturday for a boycott of parliamentary elections which are due to start in April. ElBaradei, a former U.N. nuclear agency chief, noted that he had called in 2010 for a similar boycott of polls held under president Hosni Mubarak, who was ousted the following year. "Today I repeat my call, (I) will not be part of an act of deception," ElBaradei said on his Twitter account. (Reporting by Alexander Dziadosz; editing by David Stamp)