The London Stock Exchange said an '"incident" has caused it to suspend trading in a number of shares.
While the suspension mostly affected small-cap stocks, some bigger names have also had trading halted.
The FTSE 100 - which contains no affected stocks - fell further today amid continued fears over the conflict in Israel and Gaza, as well as the prospect of higher-for-longer interest rates.
Rentokil and Rightmove both lost more than 10%, with the King's ratcatcher blaming difficulties in the US for lower-than-expected profits, while Rightmove shareholders were spooked by US firm CoStar's acquisition of rival OnTheMarket.
