NEW : 60 activists have been refused entry , a Palestinian official says . 1,500 to 2,000 Palestinian suppporters want to come in from Europe , the US and Canada . Jerusalem ( CNN ) -- Israeli authorities stepped up security at Tel Aviv 's Ben Gurion airport Sunday as hundreds of pro-Palestinian activists were due to arrive in the country in a `` fly-in '' campaign to protest Israel 's policies in the West Bank . Activists plan to go to events in Bethlehem and other West Bank towns , they say . Israel is sending some home with a saracastic letter about the event .
NEW : 60 activists have been refused entry , a Palestinian official says . 1,500 to 2,000 Palestinian suppporters want to come in from Europe , the US and Canada . Activists plan to go to events in Bethlehem and other West Bank towns , they say . Israel is sending some home with a saracastic letter about the event .