Baker McKenzie, Dentons and CMS have closed their offices in the Ukrainian capital of Kyiv until further notice. Baker McKenzie has about 100 employees in Ukraine, CMS has 67 and Dentons has 49.

Baker McKenzie and CMS representatives told Reuters that all their Ukraine-based employees are accounted for, while a Dentons spokesperson said the firm is in regular contact with employees who will be working remotely after they are “safely relocated.”

Meanwhile, some large law firms in the United States, began to prepare to offer pro bono assistance to Ukraine refugees. Jenny Rikoski, partner and co-chair of the pro bono committee at Ropes & Gray, told Law.com that the law firm is collecting a network of volunteers who can help. Other firms preparing for pro bono work were Akin Gump Strauss Hauer & Feld and Paul, Weiss, Rifkind, Wharton & Garrison.

Law firms can help Ukrainians in the United States apply for asylum; can help people who haven’t gone through a traditional visa process to enter the United States through a Humanitarian Parole program; and can partner with groups, such as the International Refugee Assistance Project, Rikoski told Law.com.