Shadow defence secretary Jim Murphy has refused to publicly retract his comments about the Unite union, which he made amid the Falkirk candidacy fix row.
Fellow Labour MP Tom Watson earlier demanded Mr Murphy withdraw his claim that Unite had "well and truly overstepped the mark" with "external interference".
But, responding on Twitter after an internal inquiry cleared the union, Mr Murphy tweeted:
@tom_watson You know how to get in touch away from Tory twitter eyes m'while I'll just get on with supporting Ed's plans for Party/TU reform
More top news
The chair of an inquiry into an alleged historical Westminster paedophile ring has been accused of 'editing' details of her impartiality.
There has been a sharp and worrying rise in the number of youngsters contacting ChildLine about suicide, the children's charity warned.
A travel firm will try to promote North Korea trips to UK holidaymakers - despite the country's current ban on visitors over Ebola fears.