MUMBAI (Reuters) - Hindustan Copper shares rose more than 5 percent on Wednesday, a day after the state-run Indian company said it may not sell shares in a follow-on offer following a jump in cash reserves on the back of soaring copper prices. Chairman and Managing Director Shakeel Ahmed had told Reuters in an interview late on Tuesday this could leave the government to sell 10 percent of its stake in the No. 3 copper producer. At 9:39 a.m. (0409 GMT), the shares were up 3.45 percent at 289.4 rupees in a weak Mumbai market after rallying more than 5 percent. (Reporting by Manoj Dharra; Editing by Ranjit Gangadharan