UPDATE 2-Ousted Thai premier Thaksin arrives in Cambodia

* Tight security in Cambodian capital for Thaksin's arrival

* Job offer from Cambodia sparked diplomatic row with Bangkok

* Minister calls Thaksin interview "offensive"

By Ek Madra

PHNOM PENH, Nov 10 (Reuters) - Former Thai Prime Minister Thaksin Shinawatra, wanted at home for a graft conviction, arrived in Cambodia on Tuesday to take up a government job offer that has set off a diplomatic row with Bangkok.

"Thaksin is now in Cambodia. He flew in on a special flight and just landed at the military airport," Khieu Kanharith, Cambodia's information minister, told Reuters.

The former telecoms tycoon lives in self-imposed exile after being toppled in a 2006 coup and later found guilty on a conflict of interest charge. He spends much of his time in Dubai.

Cambodian Prime Minister Hun Sen has made Thaksin an economic adviser to his government and offered him a home in Cambodia. Thaksin has said he does not intend to live there.

Witnesses reported heavy security for his arrival, with black-uniformed troops carrying rifles deployed on the road into the capital from the airport.