Zagreb police have confirmed a number of juveniles were detained over alleged incidents involving Celtic supporters.
Parkhead club officials had urged fans to stay vigilant should they be travelling to Croatia for the Champions League matches after being informed of a number of incidents.
A second warning over wearing colours was issued to Celtic supporters with fears they could be targeted by rival fans ahead of the fixture.
The Zagreb Police Administration have now issued a statement on reported incidents involving Celtic fans.
Officers in Zagreb have submitted a special report to the Municipal Criminal State Attorney's Office for Juveniles after two Celtic supporters were injured in two alleged connected incidents within 30 minutes at around 10pm.
First, six juveniles were investigated over alleged attempted robbery and grievous bodily injury. A 38-year-old British male was allegedly threatened with death, physically attacked on his body and stabbed in the fist with an unknown sharp object.
The police report alleges the man was leaving a catering facility when it was demanded he hand over his phone to a group of juveniles.
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It's alleged the man was assaulted when he refused to hand over his belongings before the group dispersed in an attempt to avoid police action.
The 38-year-old was left seriously injured and treated at the Traumatology Clinic of the Sisters of Mercy Clinical Hospital Center.
A second man, 19, was allegedly assaulted in the middle of a nearby street "without any reason" and was hit to the point that he fell to the ground and was then allegedly kicked.
Zagreb police say the man was put in a "humiliating position" and left slightly injured as a result of the alleged incident.
A Zagreb police statement provided after an enquiry over alleged incidents involving Celtic fans read: "Officers of the Zagreb Police Department conducted a criminal investigation against six juveniles on suspicion of committing the criminal offense of attempted robbery and grievous bodily injury to the detriment of a 38-year-old British citizen together with several unknown persons. "The conducted criminal investigation suspects that on December 8, 2024, at around 10:45 p.m. in Zagreb, in Opatovina Street, the suspects approached the injured party, who was not far from the catering facility from which he had exited, and demanded that he hand over his mobile phone and money. When he refused, one of the suspects threatened him with death, after which the injured party began to run towards the catering facility.
"The suspects ran after him and when they caught up with him, they physically attacked him by hitting him with his legs and hands on the body and, with an unknown sharp object, injured him in the area of the fist, after which they began to run away and in order not to be noticed, they divided into two groups.
"This did not escape the attention of the Zagreb police, and one group was spotted a few minutes later near Toma Bakača Street, and the other soon after on the stretch of Josip Juraj Strossmayer Square and Petar Preradovic Square. "Medical assistance was provided to the injured person at the Traumatology Clinic of the Sisters of Mercy Clinical Hospital Center, where it was determined that he was seriously injured. "Furthermore, it was established that there is a suspicion that three suspected juveniles from that group with several unknown persons committed the criminal offense of violent behavior to the detriment of a citizen of Great Britain aged 19.
"It is suspected that the suspects, on the same day at around 10:10 p.m. in Zagreb in Gajeva Street, ran up to the injured person, while he was walking down the street in the company of friends, and without any reason began to hit him with their hands in the area of the head, as a result of which he fell to the ground where the suspects continued to kick him on the body. After that, they ran away. "With the described behavior, i.e. violence in a public place, the suspects put the injured party in a humiliating position and slightly injured him. "Upon completion of the criminal investigation, the suspects were handed over to the detention supervisor within the legal deadline, while a special report was submitted to the Municipal Criminal State Attorney's Office for Juveniles in Zagreb."
