The major social networks have been called to the home office next Thursday to discuss the English riots.
So far only Facebook has confirmed its attendance, although Blackberry has suggested it will also be there.
Facebook, Twitter and Blackberry have all been criticised after it emerged that some rioters may have used them to plan trouble or encourage others.
David Cameron has said the government would look at limiting access to such services during any future disorder.
Twitter was asked by the BBC whether it planned to attend the Home Office meeting, but did not respond.
UPDATE: Twitter has confirmed it will take part in the summit (via TheNextWeb)