https://bbc.com/news/world-us-canada
The White House says that a three-year-old American whose parents were killed by Hamas is among the hostages in Gaza.
The US says there are 10 Americans still unaccounted for since the attack.
According to a readout of the call between Mr Biden and Sheikh Tamim released by the White House, the president "condemned unequivocally the holding of hostages by Hamas, including many young children, one of whom is a three-year old American citizen toddler".
Both leaders said "all hostages must be released without further delay".
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