B737NG flight crew reported a rejected takeoff due to a runway incursion downfield.

Attributes
ACN	1563567
Time
Date	201807
Local Time Of Day	0601-1200
Place
Locale Reference	PHX.Airport
State Reference	AZ
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Total 26000
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Critical

Narrative:

Cleared for takeoff on 07L. Approximately 80 knots I saw aircraft Y crossing at the far end of the runway. As I started to abort; tower called for us to abort the takeoff. Abort accomplished. PA to passengers was made. Briefed the fas (flight attendants) via intercom. We exited the runway and returned to the gate. Maintenance inspection was performed. Aircraft cleared to cross at far end of the takeoff runway after another aircraft was cleared for takeoff.

Original NASA ASRS Text

Title: B737NG flight crew reported a rejected takeoff due to a runway incursion downfield.

Narrative: Cleared for takeoff on 07L. Approximately 80 knots I saw Aircraft Y crossing at the far end of the runway. As I started to abort; Tower called for us to abort the takeoff. Abort accomplished. PA to passengers was made. Briefed the FAs (flight attendants) via intercom. We exited the runway and returned to the gate. Maintenance inspection was performed. Aircraft cleared to cross at far end of the takeoff runway after another aircraft was cleared for takeoff.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.