The UPS plane whose engine exploded in Kentucky had flown out of Baltimore Marshall Airport less than 12 hours earlier.

When Worldport pauses package sorting and other operations, ripple effects can include shipping delays and rerouting of packages.

The death toll climbed to at least 13 on Wednesday, Nov. 5, and several people remained unaccounted for, said Louisville Mayor Craig Greenberg.

UPS, headquartered in Sandy Springs, Georgia, is warning customers that some packages may be delayed following an aircraft accident at its main U.S. hub in Louisville, Kentucky, Tuesday night.

U.S. safety investigators said on Thursday they are probing the maintenance history of a UPS cargo plane that was in Texas for repairs weeks before crashing in flames in Louisville, Kentucky, on Tuesday,

Here’s what flight data tell about plane’s final moments: 5:02 p.m.: UPS Flight 2976 pushes back from a dock at the UPS Worldport near the center of the airport and begins traveling northwest on ramp 5S toward a taxiway. 5:07 p.m.: The cargo jet holds on ramp 5S near a ramp access road.

UPS cargo plane crashes near Louisville airport; multiple victims confirmed as crews continue search in damaged industrial sites.