For millions of Lebanese, this week's mass explosion of pagers and walkie-talkies, with its bloody aftermath, is painfully similar to the horrific explosion four years ago of haphazardly stored ammonium nitrates that tore through Beirut's port,

For a second day, hand-held communication devices exploded across Lebanon and in the southern suburbs of the capital, Beirut, in an apparent attack on Hezbollah. At least 20 people were killed and 450 people were injured,

The source of Wednesday’s explosions was not immediately clear, but the blasts came a day after thousands of pagers used by Hezbollah blew up across Lebanon.