An employee of a South Jersey business security company died after a co-worker opened fire Monday morning. At around 7 a.m. this morning, the shooter opened fire at Shields Business Solutions – an armored car service provider and ATM repair and restocking company – in Moorestown, New Jersey.

The shooter turned the gun on himself after shooting his coworker, who was airlifted to Cooper University Hospital with four gunshot wounds, police reported.

The shooter had a gun at the time of the attack, as the victim had already locked up his firearm, NBC Philadelphia reports.