WASHINGTON (AP) — The U.S. will soon deliver four more advanced rocket systems to Ukraine, under a new $625 million package of aid expected to be announced Tuesday. That’s according to U.S. officials who spoke on condition of anonymity to provide details of the package ahead of the announcement. The decision marks the first time the U.S. has sent more High Mobility Artillery Rocket Systems to Ukraine since late July, and it will bring the total number delivered so far to 20. The systems have become a key tool in Ukraine’s ability to strike bridges that Russia has used to supply its troops, enabling Ukrainian forces to make inroads in Russia-controlled regions.