* Netanyahu says Israel won't allow border to be breached
* Protests follow killings at May border demonstrations
(Updates death toll)
By Allyn Fisher-Ilan
MAJDAL SHAMS, Golan Heights, June 5 (Reuters) - Israeli troops opened fire on Sunday at Palestinian protesters in Syria who rushed towards a border fence and Syrian state television said six demonstrators were killed.
"Anyone who tries to cross the border will be killed," Israeli soldiers shouted at the crowd of several hundred through loudspeakers on the Israeli-occupied Golan Heights.
