>Share trading

The papers are reporting the same thing here with trading in British Airways shares along with a report (which may not prove to be true) that BA were a target but the potential hijackers were caught.

Post edit:
The only Financial Times coverage that I can find relates to short selling of shares, mainly insurance companies:

http://news.ft.com/ft/gx.cgi/ftc?pagename=View&c=Article&cid=FT3NN2CHRRC&live=true&query=suspicious+trading

The two BBC stories, are less technical, so may not answer your question:

http://news.bbc.co.uk/hi/english/business/newsid_1558000/1558586.stm

http://news.bbc.co.uk/hi/english/business/newsid_1554000/1554362.stm