Angela Merkel and her European allies are preparing to retaliate against Vladimir Putin’s government over the poisoning of one of his top critics, but their plans may not make much of an impression on the Kremlin.

Although countermeasures are all but inevitable, the European Union action may consist of asset freezes and travel bans for Russian officials, according to officials familiar with the discussions. The almost-completed Nord Stream 2 gas pipeline between Russia and Germany, Putin’s real weak point, is likely to be spared, officials said.

Taking action against security officials would have limited impact in Moscow, although it would be "painful” if major business figures and top officials were targeted, said Ivan Timofeev, an expert from the Russian International Affairs Council, a Kremlin-founded research group.