At least six Palestinians killed in latest escalation of violence with Israel

Palestinians killed in clashes with Israeli forces during raids in West Bank refugee camps and unrest on Gaza border
Raids by Israeli forces aim to arrest suspects; Palestinians respond with gunfire, explosives
Unrest at Gaza border involves tire burnings and attempts to breach security barrier
Violence has escalated over past year between Israel and Palestinians amid increased raids and attacks
Unrest follows rise in Jewish nationalists visiting contested Jerusalem holy site