Four killed in Beirut southern suburbs blast: security source

Credit: Reuters/Khalil Hassan

1 of 2. Firefighters extinguish a fire at the site of an explosion in the Haret Hreik area, in the southern suburbs of the Lebanese capital Beirut January 21, 2014.

The source said another 20 people were wounded in the explosion, which occurred in a stronghold of the military and political movement Hezbollah.

(Reporting by Laila Bassam; Writing by Alexander Dziadosz; Editing by Jon Boyle)