Germany will give the go-ahead for German-made Leopard tanks to be sent to Ukraine if the United States agrees to send its own Abrams tanks, a government official told Reuters.

German Chancellor Olaf Scholz has made this demand several times in recent days behind closed doors as he faces pressure from other European countries to provide Ukraine with the tanks, the person said, speaking on condition of anonymity, Reuters reported.

The next major U.S. military package to be announced on January 20 for Ukraine may not include American M1 Abrams tanks, according to three undisclosed U.S. officials cited by Politico. Bloomberg reported on Jan. 18 that the package could include Stryker combat vehicles.

Members of the European Parliament on January 18 urged Germany to transfer Leopard 2 tanks to Ukraine “without further delay”, saying that Ukraine “urgently needs military aid and heavy weaponry to win the war”.

Both Poland and Finland have expressed their readiness to send their Leopard tanks to Ukraine, but since the tanks are produced in Germany, handing them over to Ukraine requires Berlin’s approval.