More women have claimed they were sexually assaulted and robbed during New Year's Eve celebrations in the German city Cologne, as police faced criticism for their handling of the incident.
At least 106 criminal complaints have been filed since last week, Cologne police spokesman Christoph Gilles said. The figure has increased from 90 since Tuesday.
"At least three quarters have a sexual component. In two cases we are investigating crimes that amount to rape," Mr Gilles said.
About 1,000 men described by police as being of "Arab or North African origin" gathered around Cologne's main station, next to the city's famous cathedral, on the night from Thursday to Friday. Smaller groups then surrounded individual women, harassed them and stole their belongings.
Police initially failed to mention the assaults in report the following morning, describing the festivities as "largely peaceful".
Details of the attacks only emerged over the weekend and calls have grown for a comprehensive review of police actions on the night, after some witnesses claimed that officers did not stop the attackers.
Mr Gilles said police were well prepared on the night, but "surprised" by the scale and aggression of the attacks.
Mayor Henriette Reker said she expected police to analyse what went wrong and "draw consequences from that".
She did not elaborate on what that would entail. Police chief Wolfgang Albers has shrugged off questions about his own future, saying that he will stay in his post, though he acknowledged that the initial failure to mention the assaults was a mistake.
Ralf Jaeger, North Rhine-Westphalia state's interior minister, said he expected a detailed report from Cologne police this week on who knew what when.
"The Cologne police force must clear up meticulously what happened where and when, what police could know and evaluate when and where, and what measures have to be taken."
Mr Gilles, the police spokesman, said the city has 10 officers working on the attacks and four men have been detained.
Among the angles police are investigating is whether there are any links to similar crimes committed over the past two years in the nearby city of Dusseldorf, where men have groped women to distract them before stealing their belongings. The two cities are 25 miles apart.
Markus Niesczeri, a spokesman for Dusseldorf police, said that since the start of 2014, officers there have identified more than 2,000 suspects of North African origin in connection with organised thefts, though he did not say how many. He declined to say whether there have been any arrests in those cases.
"At the moment we can't make a serious connection because we don't have the perpetrators from New Year's Eve," Mr Gilles said. "It's not excluded that there are overlaps, but that's still the subject of investigation."
Police are encouraging more women to come forward.
"Most of the victims were from outside Cologne who filed criminal complaints in their home towns or with federal police," Mr Gilles said, adding that they included women of all ages and nationalities.
In addition to widespread shock over the scale and nature of the attacks, the incident has also fuelled public debate about Germany's ability to integrate large numbers of migrants.
Germany registered nearly 1.1 million people as asylum seekers last year, according to Interior Ministry figures released on Wednesday, and some politicians who have called for limits on migration have seized on the incident in Cologne to bolster their position.
Germany's top security official stressed that those involved must be punished regardless of where they come from. Interior minister Thomas de Maiziere said that "you cannot draw a general suspicion against refugees from the indications that they were perhaps people who looked North African".
He added that "a bit of patience is necessary to clear up as completely as possible the structure of the perpetrators and the organisational structures there might have been", including whether there was any link to similar, smaller-scale incidents on New Year's Eve in Hamburg.
Mr De Maiziere noted that, under German law, criminal behaviour has a direct effect on a person's asylum proceedings if he or she is sentenced to at least three years in prison. He said that "we will have to talk about whether that needs to be changed".
In any case, "anyone who commits serious crimes, whatever status he is in, must reckon with being deported from Germany", Mr de Maiziere said.
About 100 people protested Wednesday against a far-right rally near the train station that numbered less than 10 people.
Cologne's mayor, meanwhile, was mocked on social media for saying, when asked on Tuesday about what women can do to protect themselves better: "There is always the possibility of keeping a certain distance, more than an arm's length" from strangers.
Some of those who criticised her felt that Ms Reker was blaming women for the attacks and lambasted the idea that women could have simply protected themselves by keeping men at arm's length.
Ms Reker later said that she regretted any misunderstanding, but had merely been pointing to existing prevention and counselling programmes in response to a journalist's question.
"The priority is for concrete security to be provided on our streets and squares," she said.