The batteries of the walkie-talkies used by Lebanese armed group Hezbollah that blew up this week were laced with a highly explosive compound known as PETN, a Lebanese source familiar with the device's components told Reuters.

The batteries of the walkie-talkies used by Lebanese armed group Hezbollah that blew up this week were laced with a highly explosive compound known as PETN, a Lebanese source familiar with the device's components told Reuters.

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.

Hezbollah officials and Lebanon's state media say explosions went off in Beirut and multiple parts of Lebanon. Officials said that walkie-talkies and even solar equipment detonated a day after hundreds of pagers blew up.

At least 20 people have been killed and more than 450 others wounded by a second wave of explosions from wireless communication devices in Lebanon, the country’s health ministry says. Reports say a large number of walkie-talkies used by the armed group Hezbollah blew up in the southern suburbs of the capital Beirut,