WACO, Texas — The 20th anniversary of the disastrous raid on the Branch Davidians compound near Waco passed quietly Thursday, as colleagues of the four agents who died gathered in private and local officials made no plans to mark the day.

The Bureau of Alcohol, Tobacco, Firearms and Explosives held a ceremony in Waco to honor agents Conway LeBleu, Todd McKeehan, Robert John Williams and Steven Willis, the four agents who died in the Feb. 28, 1993 raid. Six Davidian members also died in that raid, which began a 51-day standoff that ended with the compound burning and the deaths of about 80 more sect members, including two dozen children.

The incident cast an international spotlight on Waco and Central Texas, as well as the ATF, which was criticized in a later government review for not calling off the raid after sect members found out about it....