A new report by Prague's Jewish community has registered a significant increase of cases of harassment and threats against Jews last year.

The annual report on anti-Semitism released Monday says such attacks — including anti-Semitic letters and emails, verbal attacks and harassment in front of Jewish objects — jumped to 37 in 2014 from nine in 2013.

The report says attacks against Jews on the Internet rose to 191 cases compared to 156 the previous year.

The report says anti-Semitism in the Czech Republic remains at a relatively low level with one physical attack registered last year and five attacks on Jewish property. The biggest threat is posed by potential terrorist attacks by radicalized individuals.