WPP announced on March 4 that it is discontinuing its operations in Russia due to Vladimir Putin’s decision to invade Ukraine, which has created a humanitarian crisis in Europe.

The ad/PR holding company, which has nearly 1,400 people in Russia, thanked them for their service to clients. It promised to work closely with clients during the winddown of operations.

WPP has 200 staffers in Ukraine who “have shown extraordinary resilience and bravery in the face of the horrific attack on their country,” according to its statement.

The British firm has partnered with the UN Refugee Agency to run a fundraising appeal to help Ukrainians forced to flee their homes.