My son is innocent, says father of alleged Manchester bomber
Ramadan Abedi said he spoke to his 22-year-old son Salman Abedi five days ago and he was getting ready to visit Saudi Arabia and sounded "normal".
He said that his son visited Libya a month and a half ago.
The elder Abedi told The Associated Press by telephone from Tripoli: "We don't believe in killing innocents. This is not us."
He said his other son, Ismail, was arrested in England on Tuesday morning.
He said Salman was planning to head from Saudi Arabia to Libya to spend the holy month of Ramadan with family.
Mr Abedi fled Tripoli in 1993 after Muammar Gaddafi's security authorities issued an arrest warrant and eventually sought political asylum in Britain.
Now, he is the administrative manager of the Central Security force in Tripoli.