SAN DIEGO — Fire officials responded to a structure fire at a UPS distribution center in Kearny Mesa on Friday morning, said the San Diego Fire-Rescue Department.

According to SDFD, the call came in shortly before 4:40 a.m. reporting that there was a truck on fire inside the building and that there were about 300 additional trucks inside.

Fire units arrived at the scene at 7925 Ronson Road roughly five minutes after the call.

Employees at the facility, where drivers pickup deliveries, evacuated and were seen standing outside of the building by FOX 5.

The sprinkler system inside the building activated and firefighters were able to quickly knock the fire down at 4:52 a.m., SDFD said. The fire was contained to the truck where the blaze initially started.

No injuries were reported and firefighters performed air monitoring tests to make sure the quality was acceptable before letting employees go back inside. 

The SDFD Metro Arson Strike Team will investigate to determine the cause but officials say it doesn’t appear to be suspicious at this time.

UPS made the following statement regarding the matter:

“We are thankful all our employees are safe. The cause of the fire is under investigation and we are respectfully deferring questions about the incident to the investigating authorities. We can confirm a fire started inside one of our delivery vehicles, and unfortunately, the vehicle and its 150 packages were lost. This was an isolated incident, no other property or packages were damaged, and all other shipments from this distribution center will be delivered as scheduled. We are contacting the affected customers, but if customers have concerns about their deliveries, they can track their packages and get status updates on UPS.com or the UPS My Choice mobile app.”