- Biden, Johnson say they still hope for diplomatic agreement

U.S. President Joe Biden and UK Prime Minister Boris Johnson held a 40-minute phone conversation on Monday.

The two leaders have said not all hope is lost for a diplomatic solution to the Ukraine crisis, but warned that the situation remains fragile.

- U.S. temporarily relocates embassy in Ukraine to western city of Lviv

U.S. Secretary of State Antony Blinken announced Monday that the U.S. will temporarily relocate its embassy in Ukraine from the capital city of Kyiv to the western city of Lviv.

- U.S. defense secretary to visit Belgium and Eastern Europe this week

U.S. Defense Secretary Lloyd Austin will depart for a trip Tuesday to visit Belgium, Lithuania and Poland, the Pentagon said on Monday.