JERUSALEM — The Israeli military says dozens of armed men have gathered on the Syrian side of the frontier in the Israel-controlled Golan Heights. Authorities closed a tourist site there in response.

An Israeli spokesman said it was unclear what the armed Syrians were doing. He said there was no violence, and a tour group left Mount Hermon without incident. The army was watching the area. He spoke on condition of anonymity under military rules.

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Israelis are concerned that fighting from Syria's civil war could spill across the border. Last month, mortar shells exploded in Israeli-controlled territory. Nobody was hurt. Israel said the shells were misfired.

Israel captured the Golan Heights from Syria in the 1967 Mideast war. It later annexed the strategic territory in a move that is not recognized internationally.