Secretary of State Antony Blinken traveled to Egypt for fresh talks on an Israel-Hamas cease-fire, as tensions with Hezbollah persist at the Israel-Lebanon border in the wake of the shocking explosions of wireless devices.

Some details of how the attacks unfolded are still a mystery. But initial imagery of the attacks on Tuesday and the explosive devices offers clues.

WASHINGTON -- Israel warned U.S. Defense Secretary Lloyd Austin in a call Tuesday that a military operation was going to take place in Lebanon but gave no details, U.S. officials said Thursday. The same day of the call, in an attack widely blamed on Israel, thousands of pagers belonging to Hezbollah militants exploded.