US failed to accurately track about $1 billion in arms sent to Ukraine: Watchdog

American personnel failed to adequately track roughly a billion dollars worth of sophisticated U.S. weaponry supplied to Ukraine, falling short of the Pentagon's rigorous security measures for arms that contain sensitive technology or are vulnerable to diversion or misuse, according to a report released Thursday from the Defense Department's inspector general.

Inspector General Robert Storch found that while accounting practices have improved since Russia's invasion began, as of last June, tracking of more than half of the U.S.-supplied Javelins, Stinger missiles, night-vision devices and other defense articles subject to enhanced end-use monitoring standards sent to Ukraine "remained delinquent."

The total value of the equipment in question is $1.7 billion.

The report, in redacted form, does not allege that any of the weaponry was misused, stating, "it was beyond the scope of our evaluation to determine whether there has been diversion of such assistance."