Sky Sports revealed last week that Nottingham Forest had made an approach for the prolific 29-year-old.
It is believed that the Reds have now been joined in the transfer hunt by Championship rivals Bolton Wanderers and Wigan Athletic.
Mulenga is eager to test himself in English football and would appear to have several options to consider as he contemplates a summer switch.
"There is a lot of interest in Jacob," Mulenga's agent Willie McKay told Sky Sports.
"Myself and Jacob are speaking to a number of clubs about a move.
"Jacob's dream is to play in England and we hope to make a decision soon."