A source in Lebanon tells me that there have been two mass roundups of Syrian refugees at Beirut's Martyrs' Square since Saturday. The Syrians had been displaced by Israeli airstrikes & were on the streets with scores of other IDPs. The source tells me she is certain that Syrians were targeted, because police went around asking people for identifying documents, presumably to avoid arresting Lebanese.
The Saturday arrests began late, around 22h00, just after journalists had left for the night.