CAPE CANAVERAL, Fla. -

SpaceX is now targeting early July for its launch from Cape Canaveral of a Falcon 9 rocket carrying a half-dozen commercial satellites.

The company said Monday that engineers will take more time to evaluate an unidentified "potential issue" that postponed a planned launch attempt on Sunday, spotted during preflight checks.

SpaceX previously said it would keep the Falcon 9 vertical at Launch Complex 40 in hopes of being ready to launch as soon as Tuesday.

However, the Air Force had planned to close the Eastern Range this week for scheduled maintenance, work that has been rescheduled multiple times, Local 6 News partner Florida Today reported.

Pushing the launch out by more than a week allows that maintenance to proceed while SpaceX works on its technical issues.

The mission is attempting to launch six Orbcomm Generation 2 satellites that will upgrade a low Earth orbit constellation providing machine-to-machine communications.