The violence in Syria threatens an uneasy truce in neighbouring Lebanon where guns have reappeared on the streets after years of peace.
There has been violence in the Lebanese capital Beirut today following the funeral of a security chief whose death many blame on Syria.
For the people of Beirut, Friday's car explosion is a bloody and terrifying throwback to the bad old days of civil war.
Earlier today reports suggested planes had struck a convoy carrying weapons from Syria to Lebanon.
The Associated Press reports the shipment included Russian-made SA-17 anti-aircraft missiles, which could pose a serious threat to the region's balance of power if they fall in the hands of Iranian-backed Hezbollah.
– Syrian army statement
The fighter jets of the Israeli enemy sneaked from the south of the Golan heights below the radar and attacked the research centre which is meant to upgrade the level of resistance and self-defense.
The statement added that two people were killed and another five wounded in the bombing.
Syrian state television has claimed that Israeli warplanes attacked a research centre near the capital Damascus at dawn today, according to Reuters.
Israeli warplanes have bombed a military site near Damascus, the Associated Press reports citing the Syrian state news agency.
A well-placed Israeli defence analyst has told me that an airstrike reported to have taken place on the Syria-Lebanon border did indeed happen.
The target was a truckload of scud and anti-aircraft missiles believed to be bound for the militant group Hezbollah.
He told me that the hit happened in Hezbollah territory inside Lebanon.
However, as the Syrian, Lebanese and Israeli governments are likely to stay silent on the strike, this could be end of it for now.
A Lebanese news agency is now denying that there's been an Israeli strike on its border with Syria.
A Lebanese military source has told me he heard sonic boom from jets last night, but no boom of an explosion.
Media in Israel are reporting that there has been an Israeli airstrike on a weapons convoy heading from Syria towards Lebanon.
The reports come after Israel raised fresh concerns about Syrian chemical weapons getting into the hands of the militant group Hezbollah.
The Israeli military has declined to comment.
Five men have been killed in the Lebanese port city of Tripoli today during sectarian clashes between gunmen loyal to opposing sides in neighbouring Syria's civil war, residents told Reuters.
Ten people have now died in sporadic clashes in the city since Tuesday, the latest bout of violence that has roots in Lebanon's own 15-year civil war but which has intensified as Syria's conflict polarised Lebanese society.
The unfired rockets, which were mounted on launchers, were found in the town of Halta about 1 km from an Israeli military site on Mount Hermon.
They appeared to have put in the area since the offensive on Gaza began last week, the security sources said.
Lebanese soldiers surrounded the area around the intended launch site and cut off several nearby roads, according to a Reuters journalist in the area.