Thousands of pagers used by the militant group Hezbollah exploded across Lebanon at 3:30 p.m. on Tuesday, wounding as many as 2,800 people and killing at least 12, according to health officials. The massive apparent attack raised immediate questions about how the tiny devices could have exploded at the same time.

Pagers used by hundreds of members of Hezbollah exploded almost simultaneously in Lebanon and Syria Tuesday, killing at least 12 people.

Hezbollah is accusing Israel of somehow turning thousands of its communication devices into deadly weapons, killing 20 and wounding over 450. CBS News New York's Dick Brennan reports.

Post national security reporter Shane Harris breaks down the Israeli attacks on thousands of Hezbollah pagers and radios on Sept. 17 and 18.

More than 20 people, including at some children, have been killed after pagers and walkie talkies exploded, Lebanon says.

Over two days, pagers and walkie-talkies used by Hezbollah detonated, wounding and even crippling some fighters, but also maiming civilians and killing at least two children.

The Associated Press news agency cited an anonymous Hezbollah official who blamed Israel for targeting the device. However, Israel has not admitted any part in the attack and the Israeli military have declined to comment.