A travel warning in place for Sinai is already at the highest level, but new warnings have Israel considered a temporary closure of the border.
Offensive near to Euphrates dam, in danger of collapsing, comes amid gains against ISIS in major city of Mosul.
The takeover is Syrian government's second campaign to regain the desert town; it seized Palmyra from ISIS last March only to lose it again 10 months later.
Prime minister says strikes were a retaliation for recent increase of ISIS attacks in Baghdad.
Turkish artillery fire also hit 104 ISIS targets, including buildings and bombed vehicles in Syrian town, army says.
Advance is part of a major assault to drive Islamic State from the western half of Mosul, Iraq's second-largest city.
Members killed by drone were planning a rocket attack at Israel, ISIS-aligned news agency reports.
Iraqi forces took control of eastern Mosul last month from ISIS, but the west remains in the hands of entrenched extremists.
In light of the threat from Sinai, Egypt has deployed 20,000-25,000 soldiers to the area, far exceeding the amount allowed by the Israel-Egyptian peace accords. But with Israel's blessing and intelligence cooperation, Wilayet Sinai's 1,000 fighters are on the back foot.
The militant group took over several government-held positions in the area.
While the Islamic State group continues to suffer defeats in Iraq and Syria, its counterpart in Sinai is becoming increasingly active – much to Hamas’ annoyance.
UN officials estimate 750,000 people remain in Mosul west of the Tigris River that flows through the last remaining major urban center held by Islamic State in Iraq.
Palestinian president calls on Arab League to endorse Palestinian position ahead of Trump meeting.