The 20-year-old has joined Brighton on a six-month loan deal with a view to a permanent move, according to reports.
“Kazenga was one of our main summer targets and I am delighted we have finally come to an agreement with Newcastle United. I am sure the fans will be equally delighted to see him back at the club,” Poyet told the club’s official website.
“He will join us for our week away, which will be vital, and I am sure those travelling to support will be delighted to see him in a Brighton shirt once again.”