BANGKOK, Nov. 11 (Xinhua) -- The Thai government on Wednesday morning sent a letter to Cambodia's government requesting the latter to extradite Thaksin Shinawatra, one day after the convicted former Thai prime minister arrived in Phnom Penh, Thai Foreign Ministry spokeswoman Vimon Kidchob told Xinhua.

    However, the Thai government has not yet received any official reply from the Cambodian government, the spokeswoman said in a telephone interview.

    Thailand and Cambodia have downgraded their diplomatic relations due to the spat over an appointment of Thaksin by the Cambodian government as an economic advisor on Nov. 4.

    A day after the appointment of Thaksin, the Thai government recalled its ambassador from Cambodia and Cambodia followed suit.

    Thaksin, who arrived in Cambodia on Tuesday, will on Thursday hold a briefing with over 300 Cambodian economics experts at the Ministry of Economy and Finance, Cambodian Prime Minister Hun Sen said earlier.

    Thaksin was ousted by the military coup in September 2006, in accusation of corruption, and is living in exile since then.

    He returned to Thailand in February 2008 to face corruption charges; but he later fled into exile again before he was convicted in absentia and sentenced to two-year in jail.