Israeli military aircraft Friday dropped leaflets urging Palestinians to stay away from the Gaza-Israel border fence. They also warned that people endanger their lives if they follow the directives of Hamas organizers of the weekly protests there, AP reported. The leaflets were dropped ahead of what is to be the fourth large-scale border march since March 30. In the past three weeks, 28 Palestinians have been killed and hundreds injured by Israeli troops firing from across the border fence. The military has said it is defending Israel’s border and that its troops, including snipers, only target “instigators.” It has also accused Hamas of using mass protests as a cover for attacks.