A new study by Prague's Jewish community released on Monday registered a significant increase of attacks against Jews on the Internet for the second straight year.
The annual report on anti-Semitism said the number of Internet attacks, including texts, photos and videos, jumped to 156 in 2013 from 82 in 2012.
The report said the pro-Israeli stance of the Czech government was among the reasons for the attacks.
Besides the Internet attacks, it said anti-Semitism in the Czech Republic remains at a relatively low level with one physical attack registered last year and three attacks on Jewish property.
The anti-Semitic materials, the report said, include the incitement, support and justification for killing Jews, their demonisation, denial of the Holocaust, and the de-legitimisation of the state of Israel, among other things.
The report concluded that the situation regarding anti-Semitism has been "quiet" in the Czech Republic compared with other European countries such as Hungary and France.
Also Monday, police said they broke up a Czech branch of an alleged Russia-based neo-Nazi organisation known as Wotan Jugend. In a statement, spokeswoman Andrea Zoulova said the local branch was established by a 21-year-old foreigner of unspecified origin, and a total of five people are under investigation in the case. They face up to five years in prison if tried and convicted of racism.