At least eight agencies are investigating a fire at a Bayer executive’s home as a possible arson, authorities said, as many companies increase security for executives following the killing of a United Healthcare CEO.

At least eight agencies are investigating the cause of a fire at the home of a Bayer pharmaceutical executive in New Jersey earlier this month.

A fire at the New Jersey home of a Bayer executive, sparked exactly three months after the assassination of Brian Thompson, is being investigated as arson.