(CNN) Reports of anti-Semitic incidents have spiked in the UK this year, according to a new report.

The Community Security Trust (CST), a charity that monitors anti-Semitism in Britain, said there were 892 recorded incidents in the first six months of 2019 -- a 10% increase compared to the same period last year. It is the highest number in this period since records began in 1984.

CST said reports of incidents have risen for a third year in a row, in a sign of Britain's growing struggle with anti-Semitism.

"The problem is spreading across the country and online, it reflects deepening divisions in our society and it is causing increasing anxiety in the Jewish community," said David Delew, CST's chief executive.

Two-thirds of the reported incidents were recorded in London and Manchester, two cities with large Jewish communities.

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