<div>State-run gas utility GAIL India is in talks to buy a stake in the Tanzanian assets of British oil explorer Ophir Energy Plc, the Indian company's marketing head said.<br /><br />Ophir had offered to sell a 40 per cent stake in the Tanzania gas field, half of which has already been sold, said Prabhat Singh.<br /><br />"There are various options. We are negotiating with them," Singh told reporters, without elaborating how much stake GAIL plans to buy.<br /><br />(Reuters)</div>