President Donald Trump says while he likes "the concept of a ceasefire," because it stops "killing people immediately," he said a peace deal could be still made between Russia and Ukraine while they're still fighting.

Trump also said he would back European security guarantees for Ukraine, though he stopped short of committing U.S. troops to the effort during talks with President Volodymyr Zelenskyy at the White House to bring an end to Russia’s war on Ukraine.

Trump said Ukraine would get "very good protection."

Zelenskyy wants security guarantees as part of any deal to end Russia’s war against his country.

“We’re going to be discussing it today,” Trump said. He said European leaders want to give Ukraine protection and the U.S. will participate.

Zelenskyy outlined what he said his country needed to feel secure, which included a "strong Ukrainian army" through weapons sales and training.

The second part, he said, would depend on the outcome of Monday's talks and what EU countries, NATO and the U.S. would be able to guarantee to the war-torn country.

Trump stopped short of committing U.S. troops to the effort, saying instead that there would be a "NATO-like" security presence but that all those details would be hashed out in their afternoon meeting with EU leaders.