Ms Barron added: “While incidents of this nature are rare in our region, we recognize the impact they have on the lives of those involved and the wider community.
“If they occur, we are committed to bringing those responsible to justice.”
She said: “Officers will remain in the area for the next few days and I urge anyone with information or concerns to speak to them.
“Once again I would like to reiterate my plea to the public not to speculate on details of the investigation.
“What may seem like an innocuous comment or social media post to you can actually disrupt an ongoing investigation and further upset the victim’s family.
“If you saw anything or have any information about what happened, we would like to ask you to contact the officers directly.”
Tomasz is considered an enthusiastic and talented football player.
Gateshead Cleveland Hall Community Football Club said in a statement: “As a club we are deeply shocked today to hear that one of our young footballers has lost his life.
“Our thoughts and prayers go out to his family, friends and everyone who knew Tomasz.”
And on a GoFundMe page set up in his memory, one of the boy’s coaches said: “Tomasz was a very nice, caring young man. He was brought to the UK by his parents for a better life and was not earning anything. happened to him.
“He was loved and loved by many. He was a very passionate footballer who we all had the pleasure to coach.”
“He was a beloved member of his local community and will be sadly missed by all who loved him.
“This is every parent’s worst nightmare come true and they can’t imagine what they’re going through.”
The appeal in support of Tomasz’s family had raised nearly £12,000 on Wednesday morning.
Northumbria Police and Crime Commissioner Kim McGuinness said on Tuesday: “It is devastating that our region has lost another young person to serious violence, and my thoughts are with the victim’s family, who will experience unimaginable pain.”
A card with flowers left at the scene read: “For Tom, words cannot even explain how much my heart broke when I found out you had passed away. You were a wonderful friend to many and we all loved having you as a friend. You had the best music and the most infectious smile. You are loved and missed by many.”
Another said: “Dear Tom, I’m so sorry you had to pass like this. I’m just glad you’re no longer suffering.”