Shares in Australia's Consolidated Media Holdings were placed on a trading halt on Monday as Lachlan Murdoch, son of media magnate Rupert, and Australian tycoon James Packer prepared to update investors on takeover plans.

Lachlan Murdoch, son of News Corp.'s Rupert Murdoch, arrives with his wife, Sarah O'Hare, for the annual Allen and Co.'s media conference Wednesday, July 11, 2007, in Sun Valley, Idaho. (AP Photo/Douglas C. Pizac)

Murdoch and gambling magnate Packer's joint bid for Consolidated Media, a buyout worth around A$3.3 billion (US$3.1 billion) launched in January, stalled last month when key financial backer SPO Partners & Co withdrew.