At least five people are reported to have been shot dead at a synagogue in East Jerusalem, with others injured.
The incident happened in the city's Neve Yaakov neighbourhood at around 20:15 local time (18:15 GMT).
Israel's ambulance service reported 10 casualties in total, some of them seriously wounded.
Israel's police department said that the suspected attacker had been "neutralised".
This breaking news story is being updated and more details will be published shortly.