UPDATE 1-African Copper settles Natasa claims, shares up

* Says Natasa withdraws petition to wind-up Botswana unit

* Shares jump as much as 21 percent

(Adds further details, shares)

LONDON, June 3 (Reuters) - African Copper Plc (ACU.L) said on Wednesday it has settled all claims made against its Botswana unit Messina Copper by investment firm Natasa Mining Ltd NSN.AX, sending its shares higher.

Natasa (NSN.L) has therefore withdrawn its petition for the provisional liquidation of Messina Copper, African Copper said in a brief statement. Natasa demanded repayment of bonds issued by Messina and lodged a petition for the winding-up of the unit after African Copper rebuffed a takeover bid in favour of one from mining investment company Zambia Copper Investments (ZCIJ.J).

In April Zambia Copper made a $22.5 million offer, including some financing, for 69.7 percent of African Copper, thereby trumping a $15 million offer from Natasa.

Last month Zambia Copper agreed a further $25.4 million financing package to enable African Copper to meet Natasa's demands.

African Copper's shares were up 6.8 percent at 9.9 pence at 0732 GMT, valuing the company at 81.52 million pounds ($135 million), after the shares earlier jumped as high as 11.25 pence. ($1=.6022 pounds) (Reporting by Victoria Bryan; Editing by Greg Mahlich)