Egypt's prime minister says it's too early to rule out any explanation, including terrorism, for the disappearance of an EgyptAir passenger plane.  

Prime Minister Sherif Ismail told reporters that search operations are ongoing where it's believed the plane lost contact.

When asked if terrorists were behind the disappearance, he said, "We cannot exclude anything at this time or confirm anything."

Egypt's president has released a statement saying that he will chair a national security council meeting today.

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