Seven people have been shot dead at a synagogue in East Jerusalem,
the most killed in an attack of this kind for years. At least three more people
The incident happened in the city's Neve Yaakov neighbourhood at about 20:15 local time (18:15 GMT).
Police described the attacker as a "terrorist" and said he had been "neutralised".
Local media identified him as a Palestinian man from East Jerusalem.
Speaking at the scene, Israeli police commissioner Kobi Shabtai called it "one of the worst attacks we have encountered in recent years".
Israeli worshippers had gathered for prayers at the start of the Jewish Sabbath in a synagogue in the Jewish settlement and were leaving when the gunman opened fire. Police say that officers then shot him dead.
Forensic teams are investigating a white car that appears to have been driven by the gunman.
Palestinian militant groups praised the attack, but did not say one of their members was responsible.
The attack was celebrated by Palestinians in the West Bank and the Gaza Strip with rallies and the handing out of sweets.