More than 150 people, including the Chief Rabbi of Russia, were trapped in a Moscow synagogue last night after an attacker attempted to enter the building.
The man, believed to be Russian, approached the Moscow Choral Synagogue as congregants took part in an evening service just 24 hours before Rosh Hashanah.
Police reported the attacker had carried a gas canister and a pistol. A shul guard suffered a minor injury after being shot in a struggle with the man, who was arrested.
Jewish community leaders said security in the area will be increased for Yomtov services.