White House 'horrified' by reports of executions in Syria

"Those responsible for serious violations of international humanitarian law and serious violations and abuses of human rights law must be held accountable," White House spokesman Josh Earnest told reporters aboard Air Force One. "As Bashar al-Assad continues to cling to power, we will not lose sight of the men, women and children who are being killed by his regime."

The State Department said Saturday that it appeared pro-government forces stormed the costal town and began executing entire families — including women and children.

"We extend our deepest condolences to the families of the victims of this tragedy," State Department spokesperson Jennifer Psaki said in a statement. "We strongly condemn atrocities against the civilian population and reinforce our solidarity with the Syrian people."

Earnest would not comment on reports that Israel launched a second wave of attacks overnight against Syrian weapons targets. But Earnest did say President Obama believed Israel was justifiably concerned that Assad could transfer advanced weapons systems to Hezbollah.

In an interview Saturday with Telemundo, Obama said he would let Israel "confirm or deny whatever strikes that they have taken."

"The Israelis justifiably have to guard against the transfer of advanced weaponry to terrorist organizations like Hezbollah," Obama said. "And you know, we coordinate closely with the Israelis recognizing that, you know, they are very close to Syria, they're very close to Lebanon. Hezbollah has repeatedly said that they would be willing to attack as far as Tel Aviv. And so the Israelis have to be vigilant and they have to be concerned."