"We are just waiting for Interpol officers to come to Bangkok and begin the extradition process," said Alexander Myrkin, a press officer at the Russian embassy in Bangkok.
Alexander Matusov was captured on Wednesday in the city of Chonburi,100 km east of Bangkok.
He is of accused of leading a criminal group in Russia that has been responsible for over 60 murders and other criminal activity.
Matusov entered Thailand in 2009 using a fake passport and has been living in the country on a retirement visa ever since, Thai immigration police in Chonburi said.
"This (extradition) will not be a long process like the Viktor Bout case. We expect it to be straightforward," Myrkin said.
DPA