Police are probing a second overnight graffiti attack on a constituency office after anti-SNP slurs were sprayed in bright red paint on the outside of the building.

Marion Fellows’ base in Motherwell was targeted on the same night MSP Aileen Campbell’s hub in Carluke was also daubed with “SNP out” by vandals.

A window at Ms Campbell’s office was smashed during the attack, leaving the South Lanarkshire representative “saddened”.

READ MORE: SNP MSP 'saddened' after constituency office attacked by graffiti vandals

Ms Fellows, who is fighting to retain her seat in the Motherwell and Wishaw seat, defiantly vowed to fight on despite the attack.

Officers do not believe the two incidents are linked, but say they are “keeping an open mind” over the investigation.

Aileen Campbell's office in Carluke was targeted in a similar attack

In a statement posted on social media, Ms Fellows wrote: “While those who oppose Scotland’s right to choose our own future resort to slurs and criminality, my team and I will not be deterred from taking our message of change to the people of Motherwell, Wishaw and Bellshill.”

“I’d urge anyone with information to contact the police so we can find those responsible. This appears to be a coordinated attack across two offices.”

MOTHERWELL SNP HUB VANDALISM: While those who oppose Scotland’s right to choose our own future resort to slurs and criminality, my team and I will not be deterred from taking our message of change to the people of Motherwell, Wishaw and Bellshill. — Marion Fellows SNP (@marionfellows) November 27, 2019

A Police Scotland spokesperson said: “Officers in Motherwell received a report of vandalism at a constituency hub in Merry Street, around 10.10am on Wednesday, 27 November, 2019.”

READ MORE: Tories mocked for election leaflet that does not mention Conservative candidates

“The incident is believed to have happened at some point between 6pm on Tuesday, 26 November, 2019 and 10am on Wednesday, 27 November, 2019.

“We are also aware of vandalism to a constituency office in Carluke which happened around the same time. These are not currently being treated as linked but we are keeping an open mind.

“Anyone with information should contact police on 101 quoting incident number 0905 of Wednesday, 27 November, 2019.”