Within a day of Russia launching attacks on Ukraine, leaders at some large U.S. law firms said they were preparing to provide legal assistance to refugees, as large numbers of people in Ukraine face the looming threat of displacement.

Jenny Rikoski, a partner and co-chair of the pro bono committee at Ropes & Gray, said the firm, ready to provide humanitarian immigration support, is now getting organized so it can “move quickly to help on these cases.”