Red Cross says 79 people injured in blast, whose cause is not immediately clear

Recent months have seen a mysterious series of blasts and blazes that have occurred throughout the country

Those being probed are director general and 3 other officials from health clinic where explosion killed 19; police chief denies incident could have been result of sabotage

Authorities say blast at Sina Athar Medical Center caused by gas leak; firefighters attempt to rescue people trapped inside facility

Blast comes during reported Israeli strikes on Syria leading to speculation it could have been caused by a stray Syrian air defense missile

Nature of incident in Middle East waters still unclear, with US and UK navies investigating; pro-Iran Lebanese news channel Al-Mayadeen says, without evidence, 2 tankers targeted