At least one person has been killed and several others were wounded in a spate of stabbings and shootings in Tel Aviv and Jerusalem, Israeli officials say.
An attacker stabbed at least 10 people in the port area of Jaffa, south of Tel Aviv, killing one person, police say.
The attack happened close to where US Vice-President Joe Biden was visiting.
Earlier, two Israeli police officers were shot and wounded in occupied East Jerusalem and an ultra-Orthodox Jew was stabbed in Petah Tikva, near Tel Aviv.
Israeli police said the attacker in Jaffa stabbed a number of people in the port area, before moving through the city attacking others.
Mr Biden was at the time meeting former Israeli president Shimon Peres in the nearby Peres Centre for Peace.
The Magen David Adom ambulance service said five of the wounded were in a serious condition.
The attacker, who has not yet been identified, had been “neutralised”, police said.
Wave of attacks
In the Jerusalem attack, police said a gunman opened fire on a group of police officers outside the Old City’s Damascus Gate, seriously wounding one of them. The suspect wounded another in the subsequent chase, but was then shot and killed, police said.
Meanwhile, witnesses in the Tel Aviv suburb of Petah Tikva said a Palestinian attacker was killed with his own knife by the ultra-Orthodox Jew who he had just stabbed. The wounded man was rushed to hospital to be treated for wounds to his upper body.
At least 28 Israelis have been killed in a wave of stabbing, shooting or car-ramming attacks by Palestinians or Israeli Arabs since October.
More than 160 Palestinians – mostly attackers, Israel says – have also been killed in that period.
The assailants who have been killed have been shot dead either by their victims or by security forces as they carried out attacks. Some attackers have been arrested.
Other Palestinians have been killed in clashes with Israeli troops.