Biden said the United States was working with Israeli officials to obtain more information as to the whereabouts of US citizens who are still unaccounted for.
Secretary of State Antony Blinken said the US had not confirmed any numbers yet but was pursuing reports of Americans among the casualties.
"Our friendship goes back over 40 years and can take us a long way," Netanyahu told the US president.
Israel and the US have weathered many storms over the years, and both countries have pressure points and influence that they wield over one another.
Readers of The Jerusalem Post have their say.
Both men exemplify qualities of proud Americans and committed Zionists, men who gave up promising careers in the US, and their American citizenship, to live in and work for the State of Israel.
A Jewish progressive activist group said it is pulling out of the Conference of Presidents over disagreements about the US, Israel, and antisemitism.