According to the Daily Mail, a security guard who worked at a Belgian nuclear plant was murdered and had his security pass stolen.
This has put authorities on high terror alert as the incident has occurred just two days after the Brussels terror attacks.
Didier Prospero, the security guard, was shot several times in the bathroom of his home in the Charleroi region of Belgium.
The unidentified killers shot Prospero, who worked for G4S security at the Tihange Nuclear power plant in the east of the country.
The murder and stealing of security pass is feared to be a part of an ISIS terrorist plot.