QPR will this morning submit an improved offer for Macauley Bonne and are also keen to bring in winger Andre Green.
Charlton have rejected previous bid from QPR for striker Bonne and insisted he is not for sale.
But Rangers are hoping a deal can be agreed for the 24-year-old, who scored 11 goals last season.
Green, 22, is a free agent, having recently left Aston Villa.
He has held talks with a number of Championship clubs.