Emb-145 first officer reported rejected takeoff due to another aircraft on the runway.

Attributes
ACN	1684824
Time
Date	201909
Local Time Of Day	1801-2400
Place
Locale Reference	MHT.Airport
State Reference	NH
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 220 Flight Crew Total 2100 Flight Crew Type 287
Events
Anomaly	Conflict Ground Conflict Critical

Narrative:

We were cleared for takeoff on runway 6. After the throttles were pushed up and thrust set; we heard tower tell a twin engine cessna about halfway down the runway 'stop; stop.' tower canceled our takeoff clearance due to the cessna crossing the runway hold short line. We executed a rejected takeoff (rejected takeoff) around 40 kts. And brought the aircraft to a stop on the runway. After checking brake temperatures; we taxied clear of the runway; contacted mx (maintenance) due to the rejected takeoff; reran checklists and takeoff data; and took off without further incident.ATC (air traffic control) noticed and also crew seeing the aircraft farther down the runway. Aircraft crossed the hold short line farther down the runway during our takeoff. Rejected takeoff. Taxied off; contacted mx; reran checklists and takeoff data; took off without further incident.

Original NASA ASRS Text

Title: EMB-145 First Officer reported rejected takeoff due to another aircraft on the runway.

Narrative: We were cleared for takeoff on Runway 6. After the throttles were pushed up and thrust set; we heard Tower tell a twin engine Cessna about halfway down the runway 'Stop; stop.' Tower canceled our takeoff clearance due to the Cessna crossing the runway hold short line. We executed a RTO (Rejected Takeoff) around 40 kts. and brought the aircraft to a stop on the runway. After checking brake temperatures; we taxied clear of the runway; contacted MX (Maintenance) due to the RTO; reran checklists and takeoff data; and took off without further incident.ATC (Air Traffic Control) noticed and also crew seeing the aircraft farther down the runway. Aircraft crossed the hold short line farther down the runway during our takeoff. RTO. Taxied off; contacted MX; reran checklists and takeoff data; took off without further incident.

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.