Cambodian Prime Minister Hun Sen said Sunday that ousted Thai Prime Minister Thaksin Shinawatra will visit Cambodia to give a lecture on economic matters in Phnom Penh on Thursday.

Kyodo News reported quoting Hun Sen as telling a news conference at Phnom Penh airport that Thaksin will address a group of 300 Cambodians. Hun Sen has appointed Thaksin as his economic adviser.

The appointment has further strained Cambodia's relations with Thailand, with the two countries locked in a festering territorial dispute.

Hun Sen made a one-hour statement shortly after arriving back from a trip to Tokyo where he attended an international conference on the development of the Mekong River region hosted by Japanese Prime Minister Yukio Hatoyama.