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U.S. drugmaker Eli Lilly

is in advanced talks to acquire biotech firm Kelonia Therapeutics for more than $2 billion, The Wall Street Journal reported on Sunday.

A deal could be reached as soon as Monday and could include additional payments tied to Kelonia meeting certain milestones, the Journal added, citing people.

Reuters could not immediately verify the report. Eli Lilly and Kelonia Therapeutics did not immediately respond to Reuters’ request for comment outside regular business hours.