Vice President Joe Biden's visit to Israel may have served as the trigger for Palestinian assailants to commit attacks against Israelis on Tuesday, defense officials said. Police said that after a situation assessment held by the senior police brass and Public Security Minister Gilad Erdan, they decided to increase their manpower and patrols across the country as a result of Tuesday's attacks. They added that they have not found any linkage between the three attacks and that they had no prior warnings.
