This includes drone components to improve communication, navigation and targeting, according to the sources, who include a senior European intelligence officer and a diplomat in the Middle East.
Russia has also shared its experience with drone warfare from its invasion of Ukraine.
The Wall Street Journal previously reported that Russia provided Iran with intelligence on the positions of American forces. This cooperation has deepened during the war, according to the sources.
Moscow's intelligence - based on collection by the Russian satellite fleet - is believed to have been used in Iranian attacks on radar warning systems in Jordan, as well as targets in Bahrain, Kuwait and Oman.
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