A glitch occurred to the Tokyo Stock Exchange market data distribution system on Thursday has led to suspended trading of 241 issues, the bourse said.

Trading of the issues has been suspended since 9 a.m., the bourse said, giving no further information on when the system would be fixed.

The bourse said the cause of the glitch is not immediately known, and investigating efforts have been initiated.

The incident would bring damage to investors and listed companies, it said.