Families of American citizens who may be held hostage in the Gaza Strip today asked the administration of President Joe Biden to help them return their people home safe and sound.

About 150 people, including many foreigners and others with dual citizenship, were kidnapped by Hamas in the attack launched in the early hours of last Saturday.

Adrienne Netta, 66, has been missing since the attack on Kibbutz Beeri in southern Israel, where a non-governmental organization said more than 100 people were killed. Her children were on the phone with her “when the terrorists broke into her house,” her 42-year-old son, Nahar, said at a news conference in Tel Aviv today along with relatives of four other American citizens.

“That was the last communication we had,” he added.

“The American government, President Biden and Secretary of State (Anthony) Blinken (…) have a responsibility to bring American citizens safe and sound to their country,” Nahar stressed.

Jonathan Deckel-Chen, 48, whose son has also been missing since Saturday, said “the US (…) must always be on the side of good”. “Hamas is evil. This thing that we witnessed, this kind of brutality, this inhumanity, has to stop,” said Deckel-Chen, who has dual Israeli and American citizenship.

American public officials contacted some of the victims’ relatives, but gave them little or no information. Israeli authorities “have not made any announcement,” Nahar Neta said.

Ruby Chen told reporters that the information he has on the fate of his son, Itai, indicates that he is a “prisoner of war.”

“The US has a lot of resources. We ask, on behalf of my family (…) that they do everything they can to end this thing as soon as possible, so that we can be a family again,” he added.