Monday 1 August 2022 04:42 PM Engineer, 52, stabbed boy to death and critically injured four others in ... trends now An engineer will appear in court today accused of killing a 17-year-old boy and stabbing four other people while tubing on Apple River in Wisconsin. Nicolae Miu, 52, was reportedly behaving 'strangely' towards a group of young boys before being confronted by Rhyley Mattison, 24, and a group of her friends. Engineer Miu launched his frenzied knife attack and stabbed Rhyley and three of her friends, leaving them in a critical condition. They approached him after spotting him chatting to a group of teenagers who looked 'uncomfortable', as Miu reportedly asked them for 'young girls' numbers. He also attacked a 17-year-old boy, from Stillwater, Minnesota, who was pronounced dead after being rushed to hospital. St Croix Sheriff’s department confirmed that Miu, from Prior Lake, Minnesota, will appear in court today, but he has not been formally charged. Rhyley, from Minnesota, confirmed that three of her friends, 20, 22, and 22, were also taken to hospital - with one of them being slashed 'from the bellybutton up'. Speaking to DailyMail.com Rhyley said: ‘I was with some friends tubing down the river, when a couple of them said that we needed to stop because there was a group of kids who looked uncomfortable. ‘There was an older man with them, so we stopped our tubes. The guys went over to see what was going on and then a few of my girlfriends and I also went over. Nicolae Miu, 52, from Minnesota, will appear in court on Monday in connection with the death of a 17-year-old boy. He left four others in a critical condition after the frenzied knife attack Rhyley Mattison, 24, was one of the four other people attacked while tubing at Apple River in Wisconsin. She described feeling as though she had been 'punched' before realizing she was bleeding Engineer Miu attacked Rhyley and three of her friends, leaving them in a critical condition, before stabbing a 17-year-old boy, from Stillwater, Minnesota, to death Officials combed the Apple river on Saturday afternoon to try and find the knife used in the stabbing of five people. A 17-year-old boy from Stillwater, Minnesota, was killed in the attack ‘They explained that this older guy was asking these younger boys if they knew younger women or could get him the numbers of some younger women. It was creepy. ‘I don’t really remember if someone said something to him, or exactly what was said, but then he punched my friend straight in the face. ‘I don’t know if I then said something to make him more upset, but then I remember him turning and staring at me and he put his hand down by my stomach. ‘He looked like he was going to punch me. I said to my friend I think he punched me, and “oh my god that hurt.” ‘I looked down and I was bleeding out because he stabbed me. After that I just remember us trying to get away. ‘A bunch of random people tried to push me down the river, because we were close to the bridge, and they were helping me hold pressure on my stomach to make sure everyone else was safe. ‘Three of my other friends got stabbed, and a teenager, Isaac passed away. We didn’t know him we just knew that he died. ‘I was the first one who was stabbed, and my other friend got cut from his bellybutton up. I have a punctured lung. ‘The doctors had to open up my stomach to fix my diaphragm and they’ve stitched me up. I’m on a lot of pain medication. Rhyley told DailyMail.com that she remembered feeling as though she had 'been punched' before screaming for someone to call the emergency services when she realized she had been stabbed. She has been left with a punctured lung and damaged diaphram Around 15-20 people were on the river in tubes at the time of the attack, at 3:45pm on Saturday Miu was reportedly on his own when he was approached by a group who were concerned about him talking to some teenagers who looked 'uncomfortable'. Rhyley claimed he also punched her female friend in the face Sheriff Scott Knudson said that the attack was a scene of 'chaos', and highly unusual. He confirmed that Miu will appear in court on Monday ‘I think he had the knife between his fingers, I just saw that I was bleeding and I screamed call 911. ‘It didn’t look like he was tubing, he was on his own. He was just walking around like a weirdo. 'The thing for me is that I’ve just moved to the same area as him and its horrible.’ Rhyley has set up a GoFundMe page, which has already raised more than $1,200, in an attempt to help her recover from her injuries. The motive of the attack is currently unclear, and police are trying to speak to anyone who was tubing on the river at the time. Rhyley and her three friends were rushed to Regions Hospital, while Isaac was taken to Lakeview Hospital in Stillwater, Minnesota, where he was pronounced dead. Miu was located at the exit point for tubers on the Apple River, which was located at the Village Park, 110 River Street, Somerset, Wisconsin. Several witness had alerted law enforcement to the suspect’s location and he was taken into custody, without incident. The Apple River has long been a popular summer recreational destination for Twin Cities residents. They were attacked at around 3:45pm by a member of what St Croix County sheriffs believe was another tubing group of about six to eight people. Sheriff Scott Knudson described the scene as ‘chaotic and scary’, adding 'I am sure anyone who witnessed this will never forget it. It is a tragedy. 'We don't know yet who was connected to who, who knew each other or what precipitated it. 'It's been a number of years since a stabbing has taken place, I don't know what to make of it. I just don't know.' All rights reserved for this news site (dailymail) and under his responsibility