MOSCOW, December 22. /TASS/. Russia will consider possible retaliatory measures against the sanctions imposed by the US and Canada, although it is important that they do not worsen the economic situation, Russian presidential aide Yuri Ushakov said on Monday.

“I cannot say now what particularly will be done in response, but it is evident that some measures will be considered, but I still don’t know what character they will have,” Ushakov said.

“It is most important that sanctions do not deteriorate the situation in the world and the economy, and also in this country,” he said.

Ushakov said Russia hopes US will realize the futility of sanctions against Russia sooner than in case with Cuba.

He also noted that no talks are being conducted on possible contacts between Russian and US leaders.

US President Barack Obama signed on Friday an executive order to impose a ban on trade ties with Crimea, which rejoined Russia after a referendum in mid-March.

The executive order “prohibits the export of goods, technology, or services to Crimea and prohibits the import of goods, technology, or services from Crimea, as well as new investments in Crimea,” according to the White House statement.

The executive order also authorises the Secretary of the Treasury to impose sanctions on “individuals and entities operating in Crimea.”

The same day Canada announced that it would restrict export of technology used in Russia’s oil exploration and production.

"These actions complement similar measures being undertaken by the European Union and the United States," the statement posted on the website of the Canadian government reads.

In a statement on Saturday, Russian Foreign Ministry’s official spokesman Alexander Lukashevich said Russia would work on tit-for-tat measures following the new sanctions.

The US and Canada still cannot put up with the results of the free declaration of will in Crimea and Sevastopol, the diplomat said.