CAIRO (AFP) - Egypt's ex-premier Ahmed Nazif and the former ministers of interior and finance are to face trial on charges of corruption, a judicial source told AFP on Sunday. Ousted president Hosni Mubarak's sons, meanwhile, were separately questioned on Sunday on their alleged financial activities in Cyprus and Britain, the public prosecutor's office said. Nazif, "former interior minister Habib al-Adly and former finance minister Yussef Boutros-Ghali will face trial, charged with misusing public funds and unlawful gains valued at 92 million Egyptian pounds (15 million dollars)," the judicial source said. The three, along with a German businessman, are accused of illegal profiteering from a deal to import new vehicle number plates which they allegedly bought directly without a public tender as laid down by the law. They are also said to have bought the number plates for higher than their market price. The trial is part of a sweeping probe into corruption launched under the ruling military council which took power when president Hosni Mubarak was ousted on February 11 following anti-regime protests. Nazif, who Mubarak sacked along with his cabinet on January 28 in a bid to placate the growing protest movement, was remanded in custody on April 10. Adly, the widely reviled former interior minister, is already facing trial for fraud and is due to face criminal charges in connection with the shooting of protesters. Boutros-Ghali, a nephew of former UN chief Boutros Boutros-Ghali, and who held a senior post in the IMF, is currently abroad. Nationwide anti-regime protests that erupted on January 25 ended Mubarak's 30-year reign of the Arab world's most populous country and saw power transferred to the Supreme Council of the Armed Forces, which vowed to bring to justice all those found guilty of abuse. The riots, which saw violent clashes between protesters and Mubarak loyalists and security forces, left an estimated 800 people dead and more than 6,000 injured. Mubarak, who was hospitalised last week after a heart attack, has also been remanded in custody in connection with the deaths of protesters. He is in hospital in the Red Sea resort of Sharm el-Sheikh, where he fled with his family during the protests that ended his presidency. Mubarak's two sons, Alaa and Gamal, are in the Tora prison complex in the capital, and face similar accusations. On Sunday, they faced investigators at the prison after the interior ministry refused to transfer them "for security reasons," a spokesman at the prosecutor's office said. The interrogation focused on their ties "with a company in Cyprus and one of the British Isles managing investment funds of some businessmen," he added, without elaborating. Both men are also accused of forcing businessmen to give them a cut in local partnerships with foreign companies. The Tora prison complex, once home to political prisoners, now hosts a growing number of former regime officials, including Mubarak's former chief of staff Zakariah Azmy and his former party's leadership. Mubarak's National Democratic Party was dissolved on Saturday by the Supreme Administrative Court, which ordered its funds and property to be handed to the government.