Earlier, the Ministry of Defense announced another $300 million "additional aid" package.

Supplies from an $800 million security aid package for Ukraine arrived from the US "over the weekend."

Pentagon spokesman John Kirby stated this during a briefing on Monday, reports CNN. Another package will arrive "in the next 24 hours," Kirby added.

"We're prioritizing the kinds of capabilities in those shipments that we know the Ukrainians need the most -- Javelins, Stingers, UAVs. So, all that's being prioritized. Our goal is, again, I said it before, as fast as we can, as much as we can, and just keep it going to make sure that the Ukrainians can continue to defend themselves" Kirby said.

According to the Ministry release, on Friday, the Ministry of Defense announced another $300 million "additional assistance" package under authority granted by the Ukraine Security Assistance Initiative (USAI).

Kirby said the $300 million package, to be bought from contractors and not from US stockpiles, is just "another tool in the toolbox" to help Ukraine.

"The fact that we are using USAI is just another tool in the toolbox, it does not mean some kind of deficit that affects US readiness at this stage," Kirby said.

photo Twitter/ Alexei Reznikov