NEW : Witness : " I was in the back of a car with my friend and we were driving down this road. NEW : Mysterious black-shirted men terrorize residents in Latakia , witness says . Daraa is extremely tense , according to a witness . U.N. : At least 37 people have died in clashes between protesters and security forces .
NEW : Witness : Syrian security forces move to disperse protesters in Daraa . NEW : Mysterious black-shirted men terrorize residents in Latakia , witness says . Daraa is extremely tense , according to a witness . U.N. : At least 37 people have died in clashes between protesters and security forces .