«We extend our deepest condolences to the victims and to the families of all those affected, and wish those injured a speedy recovery.
We continue to monitor the situation closely and remain in touch with our Israeli partners, particularly the local authorities,» a National Security Council spokesperson said in a statement.
Meanwhile, more than 10 Britons are feared dead or missing in Israel, Sky News reported.
The death toll in the Gaza Strip rose to 560 on Monday, the health ministry in the Palestinian enclave said, as Israel pounded Hamas targets for the third consecutive day.
The Hamas-controlled ministry said «570 people were killed and another 2,900 injured» in the fighting that began on Saturday after Hamas militants fired thousands of rockets in Israel in a surprise dawn assault.
(With inputs from agencies)