(Refiles adding dropped word speaker in first paragraph) CAIRO, Feb 20 (Reuters) - more than 30 people were killed in car bomb explosions in the eastern Libyan city of Qubbah on Friday, parliamentary speaker Aguila Saleh said. Saleh told Al-Arabiya television the car bombs had targeted a petrol station and a security building. Qubbah is Saleh's hometown. (Reporting by Omar Fahmy, Feras Bosalum and Ulf Laessing; Editing by Alison Williams)