Authorities in Libya's interim government said Sunday Abdullah al-Senussi, brother-in-law of the late Moammar Gadhafi and former head of the Libyan Intelligence Service allegedly responsible for crimes perpetrated against the Libyan people during Gadhafi's 42-year rule, was captured at his sister's home in the southern town of Sabha, in the southern part of the country, The Tripoli Post reported.
It was the same section of the country in which officials captured Saif al-Islam, the son of the late dictator.
Al-Senussi was Gadhafi's right-hand man who allegedly oversaw all terrorist dealings and was a close adviser to Saif al-Islam, the BBC reported.
The ICC issued criminal warrants for Gadhafi, his son and others June 27 for alleged crimes against humanity for the government's use of military force against civilians calling for democratic reforms.
Libyan officials said Sunday they want to put Saif al-Islam on trial in Tripoli instead of an international court in Europe.
Interim Prime Minister Abdurrahim el-Keeb issued a statement saying Saif al-Islam, who was captured Saturday near the border with Niger, should be tried by his native peers rather than at the International Court of Justice in The Hague in the Netherlands.
However, he didn't rule out a role for the U.N. court in the Netherlands, Sky News said.
"Any cooperation with international institutions is welcome," he said.
Regardless, the prime minister said the National Transitional Council would ensure Saif al-Islam would be tried transparently, the Tripoli Post said.
"I reassure our people and the world that Saif, and those with him, will be given a fair trial in which international rights and norms will be guaranteed," he said.
Gadhafi ran a 42-year-long dictatorship before unrest began in February. He was killed in his birthplace of Sirte in October by revolutionary forces.