(JTA) — Israel fired on Syrian territory in retaliation for rockets fired from there into northern Israel earlier in the day.

Arab media has reported a number of casualties, including fatalities, from the Israeli bombardment Thursday, which came in response to four rockets that exploded that afternoon in an open field in the northern Galilee, the Times of Israel reported.

The rockets were the first to hit Israel from Syrian territory since 1973, the Israel Defense Forces said, according to The Associated Press. They caused no injuries.

The IDF said it believes the rockets were fired by the Iran-backed Islamic Jihad from territory under the control of the Assad regime and that it holds the government responsible for all attacks originating from there.

Syria has been engulfed in a civil war for four years.

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