LONDON, April 20. /TASS/. Leaders of Western countries discussed stepping up their pressure on Russia, including through more sanctions and diplomatic isolation, UK Prime Minister Boris Johnson’s office said following a video call on Tuesday.

On Tuesday evening, Johnson spoke to the leaders of the United States, Canada, France, Germany, Poland, Italy, Romania, Japan, European Commission, European Council, and the NATO Secretary General about the situation in Ukraine.

"The leaders agreed to work together to find a long-term security solution so that Ukraine could never be attacked in this way again. They discussed the need to increase the pressure on Russia with more sanctions against [Russian President Vladimir] Putin’s war machine, as well as further diplomatic isolation," the statement said.

The UK premier informed other leaders about his visit to Kiev on April 9. He underscored "the critical need for further military support to Ukraine in the face of a major Russian offensive in the Donbas and ongoing attacks elsewhere."

Johnson also welcomed US President Joe "Biden’s leadership," and the allies "agreed to work closely together in the weeks and months to come.".