LOS ANGELES—Three alleged gang members who prosecutors say set a 1993 fire to retaliate against a building manager’s attempt to quell drug sales have been charged with murder in connection with the blaze that tore through a Los Angeles apartment building filled with poor immigrants, killing seven children, three women and two late-term fetuses.

The scene of a deadly fire that struck an apartment building in the Westlake district of Los Angeles, taking the lives of 12 people including the deaths of late-term fetuses. Los Angeles Police Department via AP