Two Hong Kong tourists remain in a critical condition in hospital three days after they were attacked by a teenage Afghan refugee wielding an axe and a knife on a German commuter train.
The patients - identified by German news agency dpa as a 62-year-old man and his daughter's 30-year-old boyfriend - were among five people injured in the attack in Wuerzburg, southern Germany, on Monday night.
The 17-year-old attacker, Riaz Khan Ahmadzai, slashed two men and two women from Hong Kong before jumping off the train and injuring another woman who was walking her dog. He was later shot dead by police.
The Islamic State group has claimed responsibility for the attack and posted a video in which the teen waved a knife and referred to himself as a "soldier of the Islamic State".
Authorities, however, have said they believe the attacker acted alone after becoming radicalised.
Kenneth Tong, a senior officer with Hong Kong's Immigration Department, said it is hoped one of the two female victims, who had been treated elsewhere, could be transferred to the Wuerzburg university hospital soon.