President Suharto and his billionaire children are living deep within his fortified residence in central Jakarta protected by hundreds of his most elite forces, security officials said yesterday. As rumours spread across Jakarta that the children had fled to Brunei after properties linked to cronies and their vast business interests were torched, officials insisted they would remain in Indonesia. The children, particularly high-profile eldest daughter Siti 'Tutut' Rukmana Hardyanti and youngest son Hutomo 'Tommy' Mandala Putra, had barely been seen in the past two weeks, diplomats said. Tutut studied briefly at the prestigious Trisakti University, where six students were killed by soldiers on Tuesday, while Tommy inspected several showrooms of his Timor Putra Nasional car after they were looted and torched. Mr Suharto returned directly to his mansion after flying home from Cairo early yesterday morning. The rambling official mansion had been fortified recently, diplomats said. Heavily armed elite Presidential Guards yesterday fanned out in the streets surrounding the mansion. They could be seen taking up positions in hedges and on tree-lined traffic islands. 'No other army or police units - not even the best ones - can come here,' one officer said. 'This is the reserve of the Presidential Guard and no one else.' Less than a kilometre away, tanks and armoured personnel carriers of the Kostrad Strategic Reserve - a secretive elite force once commanded by Mr Suharto - patrolled the city centre. Soldiers and vehicles were stationed around squares and strategic buildings, such as the state telecommunications agency. The first eight tanks arrived on Tuesday night as the city descended into anarchy after a day of looting. The posse was reinforced by a further 38 tanks by the morning. As soldiers and military police spread across the city to bring looting and burning under control, the senior military leadership made its first steps to apologise for the deaths of the students. 'Abri [the military] is really concerned and regrets Tuesday's incident. It should not have happened,' Defence Minister General Wiranto was reported as saying yesterday in Indonesian newspapers. 'We would like to express our sympathy for the students' reform movement.' Despite the apology, gunshots echoed around the streets of the Glodok Chinatown and eastern Jakarta as clashes continued between rioters and army and police units.