The teenage attacker snuck into the settlement on Thursday evening, the Israeli army said, stabbing three people before being shot dead.
A 32-year-old Japanese man was arrested Friday on suspicion of stabbing his daughter to death and has admitted deliberately torching the house in which his wife and four other children were found dead, police said.
German officials said on Saturday they had been left "dismayed and furious" by the stabbing of two German women at an Egyptian beach resort, calling it a deliberate attack on foreign tourists.
Two men were stabbed to death in the US city of Portland on Friday when they tried to stop their attacker from harassing two women because they appeared to be Muslim, police said.
A Pakistani petrol station attendant was stabbed to death during an "absolutely horrific" crime spree in Australia with counter-terror police investigating on Friday.
An 18-year-old Palestinian threatened Israeli border police with a knife at a flashpoint junction in the occupied West Bank on Thursday and was shot dead, Israeli authorities said.