Howitzer rounds, a type of artillery ammunition, have arrived in Europe to be sent to Ukraine, a senior US defense official told reporters Wednesday, News.az reports citing Ukrinform.

The Howitzer rounds started arriving yesterday, and there will be “more arriving today and in the coming days,” the official said. In the most recent $800 million drawdown package signed last week, the US said it will send 40,000 of them total.

Training of Ukrainians on how to use the Howitzer “has begun,” the official said. The training of about 50 Ukrainians is happening in a country outside of Ukraine, but the official would not say which country it's taking place in.

“This is to train the trainers, it’s a smallish number of Ukrainians, little bit more than 50, they will get trained on how to use the Howitzers and then they’ll be able to go back into Ukraine and train their colleagues,” the official said.

Shipments of aid for Ukraine from the US continue to arrive in Europe. In the last 24 hours, about four flights of aid shipments arrived in the region, the official said. These shipments are funded by the most recent $800 million presidential drawdown package, the official added.