An Indian judge ordered a fourth summons delivered to the former chairman of Union Carbide Corp., requiring his appearance in court on culpable homicide charges in the 1984 Bhopal gas disaster.

Judge R.C. Mishra ordered Foreign Ministry officials Monday to see that the summons is delivered to the home of former Union Carbide Chairman Warren Anderson in the United States.

Anderson, Union Carbide, two Union Carbide subsidiaries and eight Indian executives were charged Dec. 2 with five acts, including culpable homicide, in the world's worst industrial disaster that killed 2,998 people and injured 200,000.