DUBAI, United Arab Emirates (AP) — When Ellie, a British-Iranian living in the United Kingdom, tried to call her mother in Tehran, a robotic female voice answered instead.

“Alo? Alo?” the voice said, then asked in English: “Who is calling?” A few seconds passed.

“I can’t heard you,” the voice continued, its English imperfect. “Who you want to speak with? I’m Alyssia. Do you remember me? I think I don’t know who are you.”

Ellie, 44, is one of nine Iranians living abroad — including in the U.K and U.S. — who said they have gotten strange, robotic voices when they attempted to call their loved ones in Iran since Israel launched airstrikes on the country a week ago.

They told their stories to The Associated Press on the condition they remain anonymous or that only their first names or initials be used out of fear of endangering their families.

Five experts with whom the AP shared recordings said it could be low-tech artificial intelligence, a chatbot or a pre-recorded message to which calls from abroad were diverted.

It remains unclear who is behind the operation, though four of the experts believed it was likely to be the Iranian government while the fifth saw Israel as more likely.

Only the second most terrifying story I’ve read today