Muammar Gaddafi’s son Saadi, his special forces commander who fled abroad during Libya’s 2011 revolution, was imprisoned in Tripoli yesterday after Niger agreed to send him back from house arrest there.

Saadi, who had a brief career as soccer player in Italy and often lived the playboy life during his father’s rule, is the first of Gaddafi’s sons the central government has managed to arrest since the former dictator was overthrown.

Gaddafi’s more prominent son Saif al-Islam, long viewed as his heir, has been held captive by fighters in western Libya who refuse to hand him over to a government they deem too weak to secure and try him. Eager to close another chapter from the four-decade Gaddafi rule, Tripoli had long been seeking the extradition of Saadi, who had fled to the southern neighbour by slipping over the porous sub-Saharan border after the uprising.

“The Libyan government received today Saadi Gaddafi and he arrived in Tripoli,” Prime Minister Ali Zeidan’s Cabinet said in a statement that thanked Niger’s government for its help.

The extradition is a success for Zeidan, but also a test whether his weak government is able to hold such a high-profile prisoner and organise a fair trial in the political chaos that has followed the uprising.

Libyan authorities believe he was active in fomenting unrest

The government said Saadi, 40, would be treated according to international law. Since escaping Libya in 2011, he had been held under house arrest in the Niger capital Niamey. Libyan authorities believe he was active from there in fomenting unrest in southern Libyan.

Within an hour of the news of his arrival, a militia on the Libyan state payroll published photographs of an uncomfortable looking Saadi in a blue prison jumpsuit, kneeling while a guard shaved his beard and head with an electric razor.

“The first pictures of the criminal,” the Libyan Revolutionary Operations Room militia said on its website, showing pictures of Saadi before and after the shave. State prosecutors are investigating Saadi for crimes in suppressing the eight-month uprising against his father, state news agency Lana said.

Tripoli also wants to try him for allegedly misappropriating property by force and for alleged armed intimidation when he headed the Libyan Football Federation.

There was no immediate official comment from Niger, which Libyan analysts said had agreed to cooperate because both countries must work together to try to secure their long border against weapons smugglers, militant Islamists and human traffickers.

Niger sources said Saadi was spirited into Libya on board a Libyan plane overnight, accompanied by Libyan security agents.