Liverpool, Newcastle following Twente striker De Jong - agent
However, Louis Laros doesn't believe Twente will allow the Holland international to leave in June.
"I don't think a transfer is possible [to Liverpool or Newcastle] because I don't think FC Twente will let him leave in the winter transfer period," Laros told IBTimes UK. "If there is a possible transfer then I think it is at the end of the season.
"I know they [Liverpool and Newcastle] are watching him but I have had no direct contact with both clubs over a possible transfer."