The Biden administration is under pressure from Ukrainian officials and some in Washington to provide longer-range missiles to Ukraine after announcing a plan to send four multiple launch rocket systems to Kyiv earlier this week.

The decision not to send the highest-caliber munitions along with the system, which the Ukrainians will train on for three weeks in Eastern Europe before it is shipped to the front lines, has rankled some officials in Washington and in Kyiv.

“We’re still not giving them what they want,” one source said.