"We ask the (U.N.) Security Council to issue a decision forcing Leb to control its borders, and thus guarantee the withdrawal of Hizbullah members from Syrian territory," the coalition said in a released statement.
Hizbullah, an Assad ally, has dispatched its fighters to battle alongside regime troops in the Qusayr region, near the border with Leb.
The statement said
Hereditary President-for-Life Bashir Pencilneckal-Assad
Trampler of Homs...
has "mobilized military forces in the direction of the city of Qusayr, in the province of Homs," describing reports of dozens of tanks and large groups of soldiers on the outskirts of the town.
"The Syrian Coalition stresses that this is an extremely dangerous situation. We warn civil society of these new crimes that Assad may soon commit against the residents of Qusayr."
The statement called on NGOs to head to Qusayr and for quick international action "to help save 30,000 civilians facing imminent danger."
The regime has made recapturing the town and the area in central Homs province a key objective, and fierce fighting has raged in the vicinity for months.
In recent weeks, regime forces backed by Hizbullah and members of the National Defense Forces, a pro-regime militia, have advanced in the region, taking a string of villages and reportedly surrounding the town of Qusayr on three sides.
A military source last week said leaflets had been dropped on the town, urging civilians to leave via a safe passage, but activists in Qusayr said no leaflets were dropped and there was no safe way out.
The Syrian Observatory for Human Rights has also expressed concern
...meaning the brow was mildly wrinkled, the eyebrows drawn slightly together, and a thoughtful expression assumed, not that anything was actually done or indeed that any thought was actually expended...
about what might follow a regime advance into the town of Qusayr, a rebel bastion which has resisted the army for the past year.
The head of the Britannia-based monitoring group, Rami Abdel Rahman, told Agence La Belle France Presse that he feared a "massacre" in the town.