Syria conflict: Homs explosion 'kills a least 40'
1 August 2013 Last updated at 23:11 BST
At least 40 people have been killed in a rocket attack on an arms dump in Syria, the UK-based group the Syrian Observatory for Human Rights has said.
Unverified footage showed a huge fireball shooting into the sky over Homs city.
The rebel Free Syrian Army said it carried out the attack, which struck in a government-controlled area.