Afren gets preliminary offer from Nigeria's Seplat

(Reuters) - Oil producer Afren Plc said it had received a preliminary offer for the company from Nigerian oil and gas explorer Seplat Petroleum Development Co Plc . Afren said Seplat has until Jan. 19 to make a firm offer. Afren's shares rose 10.5 percent to 50.82 pence on Monday morning on the London Stock Exchange. (Reporting by Abhiram Nandakumar in Bangalore; Editing by Gopakumar Warrier)