EU foreign policy chief Kaja Kallas (C) listens to Israel's Foreign Minister Gideon Saar (L) during a visit to the Yad Vashem Holocaust Memorial in Jerusalem. AFP
The Israeli army said it struck "military capabilities that remained at the Syrian military bases of Tadmur and T4," referring to bases in Palmyra and another 50 kilometres (30 miles) west of the city.
Israel said Friday it struck the same bases after a war monitor first reported the raids.
On Monday during a visit to Jerusalem, EU foreign policy chief Kaja Kallas warned that Israeli strikes on Syria and Lebanon were threatening to worsen the situation in the region.
"Military actions must be proportionate, and Israeli strikes into Syria and Lebanon risk further escalation," Kallas said at a joint news conference with Israeli Foreign Minister Gideon Saar.
"We feel that these things are unnecessary because Syria is right now not attacking Israel and that feeds more radicalisation that is also against Israel," Kallas told journalists.
In Syria, Israel has launched hundreds of strikes on military sites since the rebels overthrew Bashar al-Assad in December. It also deployed forces to a demilitarized buffer zone in southwest Syria abutting the occupied Golan Heights, occupying the UN-patrolled buffer zone.
Syria's foreign ministry has accused Israel of waging a campaign against "the stability of the country".
And despite a ceasefire, Israel has continued to carry out strikes on Lebanon -- violating the truce, which took effect on November 27.
Israel launched air strikes on southern Lebanon on Saturday, killing eight people.
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