(BBC) Georgia's President Mikhail Saakashvili has accused "Russian special services" of stirring up the civil unrest in the capital, Tbilisi.
Mr Saakashvili was speaking after riot police used tear gas and water cannon to disperse opposition demonstrators staging a sixth day of protests.
The health minister said 250 people had been admitted to hospital.
Mr Saakashvili has rejected the protesters' accusations of corruption and says he will not quit.
In a televised address, Mr Saakashvili said his country faced "a very serious threat of unrest".
"High ranking officials in Russian special services are behind this," he said, adding that he had evidence.
He said several Russian diplomats would be expelled from Georgia for engaging in "espionage".
Earlier he had recalled Georgia's ambassador to Moscow for "consultations".