"A shell was fired from Syria and hit an open area near the Israel-Syria border in the northern Golan Heights," an Israeli army spokeswoman told Ma'an.
"Initial investigations suggest the shell was a result of errant fire from Syria."
Israeli forces are searching the area and UN forces have been notified about the incident, she added.
Escalating violence against the UN Disengagement Observer Force, which monitors a 1974 truce between Israel and Syria, has seen countries recently pull out their troops.
Austria, previously the top contributor, will withdraw its 377 soldiers by the end of this month, leaving a force of 530 from the Philippines and India.
Israel seized the Golan Heights from Syria in the 1967 Six-Day War and annexed it in 1981, in a move never recognized by the international community.