Adams ordered to appear at Omagh court case
Martin McGuinness, Pat Doherty, Brian Gillen and Brian Keenan, all alleged members of IRA's ruling army council, have also been subpoenaed by lawyers.
The High Court action is due to start later this year when relatives of some of the 29 victims seek stg£10 million compensation from the gang they blame for the August 1998 outrage.