Two UN peacekeepers were wounded on Monday when mortar shells fired from Syria hit their base in the Israeli-held sector of the Golan Heights, an army spokesman said.
"Mortar shells hit the Golan in Ein Zivan and in the Zivanit UNDOF base. Two UN peacekeeping soldiers were evacuated to Israel for medical care," Lieutenant Colonel Peter Lerner wrote on his official Twitter account.
Israel public radio said they were lightly wounded in the incident.
The mortar strike took place near Quneitra in Syria, where heavy fighting has been taking place between rival rebel forces.
Shortly after the incident, the IDF stated the mortar was in fact the result of "spillover" from the Syrian conflict, and not deliberately fired at Israel.
Rami Abdel Rahman, head of the Syrian Observatory for Human Rights, told AFP that fighting has been taking place since last week between rebel groups in an area close to Syria's ceasefire line with Israel.
"There is still infighting going on among rebel groups in Qahtaniya near the ceasefire line with the Israeli-occupied Golan Heights. They're exchanging shellfire," he said.
It is only the latest case of "spillover" from Syria to hit the Israeli side, which has also seen sporadic attacks on soldiers by Islamist groups from both sides of the conflict.