Russia's RTR state television aired brief footage today of what it said was a spy from the US embassy, secretly filmed attempting to recruit a Russian agent.
The state RIA news agency said the decision to air the pictures was intended as retaliation for Washington's unfriendly act last week - expelling four diplomats and asking a further 46 to leave by July.
RTR broadcast the brief clip of grainy footage, apparently shot inside a restaurant or bar, at the end of its 5 p.m. news (2 p.m. Irish time). It said it would show a full report on its next news programme, three hours later.
RIA said the footage was filmed by the FSB security police.
Earlier today, Russia said it had turned over to US officials its list of four diplomats ordered to leave the country. Moscow has said it will match the US expulsions one for one.