The bombing follows Lebanon's arrest of a Saudi member of an Al Qaeda-linked group that bombed the Iranian embassy in Beirut in November.
Saudi Arabia is flexing its muscles in Lebanon, where the army is overshadowed by the powerful militant group Hezbollah, a key ally of Saudi rival Iran.
The Syrian Army wants to restore full regime control to the Qalamoun area, and is fiercely shelling rebels whose presence there threatens a key link to other areas.
According to a new UN report, nearly one in two Syrian refugee families living outside a camp rely entirely or partly on income generated by a child.
A new study from Oxfam estimates that more than 75 percent of Syrian refugees in Lebanon have taken on debt. Some families even rely on remittances from family still in Syria.
Iran's embassy was targeted today by suicide bombers angry at Tehran's strong backing for the Syrian regime. Saudi Arabia is throwing its weight behind anti-Assad forces.
Today's bombing on the Iranian Embassy in Beirut is the first attack in Lebanon to target Iran for its backing of Syrian President Bashar al-Assad in the civil war.
Syria was declared polio free in 1999. But the public health system that delivered vaccinations has broken down during the war, and 10 cases of the virus have been confirmed.
Syria's war has certainly heightened tensions in Lebanon, leading to sporadic sectarian violence, but there is a difference between spates of attacks and a full-scale war.
The Assad regime appears poised to attack the strategic rebel-held Qalamoun region, which separates regime strongholds of Damascus and Syria's coast. Rebel forces have swelled in preparation.
Members of the Syrian opposition have accused President Assad of transferring chemical weapons to Hezbollah in Lebanon.
Backed by Iran, thousands of Shiites are playing a crucial supporting role for the Syrian regime and the worn-out Syrian Army.
Lebanon charged a sheikh who runs a militia with close ties to Syria and a Syrian intelligence officer in the mosque bombings, showing how far into Lebanon Syria can reach.
Syrian President Assad is likely to ride out a US attack that's designed to be limited.
After attacks in its Beirut stronghold, Hezbollah is trying to protect people with new measures – while also not disrupting their lives too much.
Today's car bombs in Tripoli targeted mosques led by pro-Syrian rebel clerics.
That's one theory. The distance the rockets were able to travel indicated use of a long-range weapon that only a local Al Qaeda-linked group is believed to have.
The day after the deadliest bombing since Lebanon's civil war, Hezbollah leader Nasrallah warned that violence has the potential to touch all Lebanese.
The blast, which was felt across Beirut, injured dozens and the death toll is expected to rise.
The group that kidnapped two Turkish pilots wants Turkey to pressure Syrian rebels to release a group of Lebanese pilgrims abducted last year.
Palestinians in Lebanon resent the additional competition for jobs and housing, already scarce because of discrimination.
Aid to Syrian refugees is ad hoc because of the country's rejection of formal Syrian refugee camps.
Lebanese Sunnis lack the military organization of their Shiite rivals and have a tradition of nonviolence.
Lebanon's economy typically rides a wave of tourism every summer, but Syria's war is scaring off visitors.
The EU has voted to blacklist only the 'military wing' of Hezbollah, allowing members to continue interacting with Hezbollah's political leaders.
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