“Poland transferred military equipment to Ukraine worth about 7 billion zlotys, which is more than $1.6 billion,” he wrote on Twitter.
Muller stressed that these weapons "save Ukrainian and Polish sovereignty."
Earlier, United States Deputy Secretary of State for Political Affairs Victoria Nuland announced the supply of MLRS from the United States to Ukraine.
On April 21, US President Joe Biden announced the allocation of an additional $800 million military aid package to Kyiv.