U.S.-donated night vision devices were stolen from the Ukrainian military, according to the country’s State Bureau of Investigation (SBI).

Seven thermal imaging sights and eight night-vision devices, which doted by the United States government, were stolen from the Ukrainian Army’s warehouse located Lviv region.

“In November 2018, unknown persons stole 7 Archer thermal imaging sights and 8 night-vision devices from one of the military units in Lviv region. Optics were donated to Ukraine by the U.S. government as part of an international technical assistance program,” the SBI report said.

Also noted that the damage is estimated at $170 thousand.

According to investigators, the abduction of military property occurred due to the negligent attitude of the warehouse manager to the accounting and security of the entrusted property.

Washington has provided Ukraine with more than $1 billion in “security assistance” funds since February 2014.

The United States is a strategic partner for Ukraine. Out of the total amount of assistance that has been provided to Ukraine’s Armed Forces, U.S. aid accounts for about 90 percent.