Reports in Turkey suggest forward Muleka – who scored 12 goals in 14 appearances last season on loan from Liege at Turkish Superlig side Kasımpaşa – is a target for Besiktas, who are hoping to complete a deal for Clarets striker Wout Weghorst.
But Liege are thought to view Burnley’s offer more positively, and Standard Liege reporter Kevin Sauvage from Les Sports + claims “the two clubs have reached an agreement around €4m plus bonuses.
"Standard would also benefit from 25% on the next sale. Note that the Liège club will have to pay 50% of the transfer amount to TP Mazembe as stipulated in the clause in its contract.”
DR Congo international Muleka is expected to sign a four-year contract, once he passes his medical, the first part of which is being carried out in Belgium on Thursday, with the second in England.
The 22-year-old will also have to wait for approval for a visa, which could be issued early next week.
Fellow DR Congo international, midfielder Samuel Bastien, could join Muleka, with an €800,000 fee agreed for a player in the final year of his contract.
Bastien came through Anderlecht's youth system, making his first team debut in December 2014 in the Belgian Cup against Mechelen, replacing Youri Tielemans.
He spent time in Italy on loan with Avellino before joining Serie A side Chievo Verona for €2.5m, joining Standard in June 2018.