European countries aiming to tighten sanctions on Russia are considering targeting more banks, broadening the net to additional family members of oligarchs and strengthening curbs on the use of cryptocurrencies to evade financial restrictions in coming days, as part of a new package of measures aimed at shoring up Western pressure on Russia’s economy, according to diplomats and officials familiar with discussions.

The efforts come as the US and the European Union gear up joint task forces aimed at ensuring the sanctions already announced on Russia over its invasion of Ukraine can be effectively implemented. The trans-Atlantic efforts include work to pressure third countries that are making it possible for Russian people and companies to move assets located outside Russia beyond the reach of Western sanctions.