When streams of bloodied people converged on Lebanon's hospitals on Tuesday, it was a test of whether the crisis-hit health sector could cope with a mass casualty event like what could be expected in a wider war with Israel.

Watch a live view of Beirut after more explosions were heard on Wednesday, 18 September, with reports emerging that hand-held walkie-talkie devices have detonated. The blasts came a day after at least 12 people – including two children – were killed and thousands wounded after electronic pagers belonging to Hezbollah simultaneously exploded in Lebanon and Syria.

A senior U.S. official has confirmed to Fox News that Israel is behind the explosions of pagers used by members of Hezbollah in Lebanon.