The Syrian government and Hezbollah reportedly assisted Iran in constructing the factory.
Diplomat Michael Kozak acknowledged the change in a briefing Wednesday.
He stressed, "These American titles will not change the fact that the Palestinian territory occupied since 1967 and the occupied Arab Golan are territories under Israeli occupation in accordance with United Nations resolutions and worldwide law", Abu Rudeinah said, as reported by local Palestinian agency Maan.
"There was already strong American support, under both former US President Barack Obama and under the Trump administration for Israel's freedom of action to address threats in Syria, including those by Hezbollah", he said, adding that "the fact that the current mastermind of the efforts has significant American blood on his hands will only deepen this support".
In past years, the state department described the southern Syrian territory that overlooks the Sea of the Galilee, as "Israeli occupied", a designation that was dropped from this year's edition of the report. What we've uncovered today is just the tip of the iceberg. "And "occupied territory" has a legal meaning to it; I think what they tried to do is to shift more to just a geographic description".
The word "occupation" appears only three times in the report, but in two instances it refers to jobs when addressing occupational discrimination and labour rights.
President Donald Trump, who has shown robust support for close U.S. ally Israel, recognised Jerusalem as the country's capital in 2017, defying global consensus much to the chagrin of Palestinian leaders, who view Israeli-annexed east Jerusalem as the capital of their future state.
While the U.S. has been a staunch defender of Israel for decades, President Donald Trump's administration has pursued aggressively pro-Israel policies since coming into office. It later annexed the Golan Heights in 1981, as well as East Jerusalem, in moves not recognised internationally.
Israel occupied Syria's Golan as well as the Palestinian territories of West Bank and Gaza Strip in 1967.
"The field operatives who fill the ranks of the network and act exclusively in Syria are composed of various groups and networks who previously took part in terrorist activity in the Golan Heights under the notorious network of Kantar and Mughniyeh", the army said.
Lindsey Graham visited the Golan with Prime Minister Benjamin Netanyahu and US Ambassador to Israel David Friedman to discuss plans toward official US recognition of Israel's sovereignty over the plateau as a crucial, strategic and permanent part of the Jewish state. "I frankly can not imagine a situation in which the Golan Heights is not part of Israel forever", Friedman told the right-wing Israel Hayom newspaper at the time.