The victim of sex pest MP Patrick Grady has been threatened with disciplinary action by party bosses.
His email was suspended after he contacted colleagues to complain about the way his case had been handled.
Scottish Labour deputy leader Jackie Baillie said: “Extraordinary and appalling behaviour to target the victim. Ian Blackford really does need to go.”
READ MORE : Boris Johnson to resign after months of scandal
Grady, the MP for Glasgow North, was found guilty of sexual misconduct after making unwanted advances on a teenage SNP worker in a London bar in 2016.
The SNP’s handling of the case has been criticised after a leaked recording showed party Westminster chief Ian Blackford urging colleagues to support the MP.
He was briefly suspended from the party group, a decision that incensed the victim.
It is understood the man, now aged 25, emailed colleagues recently to complain about a range of issues, including public statements made by Blackford about the scandal.
He also claimed senior MP Kirsten Oswald had not responded to communications and alleged staff are not safe at Westminster.
In response, Oswald said colleagues had felt “upset and threatened” by the content of the emails and urged him to “cease and desist”.
She added that continuing to send emails could be treated as “misconduct” and “subject to further action” under a disciplinary process”.
Oswald also expressed concern for the staffer’s wellbeing and repeated an offer of engagement with occupational health services.
As a “protective measure” given that he is on “long term leave”, she informed the man his access to work email would be being temporarily suspended. The claims were first reported in the Sun.
An SNP Westminster parliamentary group spokesperson said: "As employers it would not be appropriate to comment on staff employment matters. There is confidential staffing information that is, rightly, not in the public domain. The SNP has a duty of care to all of its staff and, in line with appropriate advice, is acting to support all staff.
"The SNP Westminster Parliamentary Group accepted the recommendations of the independent ICGS process, and has also offered to meet with the individual to discuss their concerns as well as initiating a review of staff support to consider any improvements."
To sign up to the Daily Record Politics newsletter, click here.