All week we've been reporting on the increasing violence in Syria. It has now been reported that thousands of Palestinian refugees have been forced to flee a camp in the Syrian port of Latakia after days of shelling by President Assad's troops.  Syria says it is tackling gangs, but at least 30 people are reported to have died in Latakia in a three-day military attack.   Joining us is Chris Gunness, spokesman for the UN's Palestine refugee agency.