A senior Conservative peer has called for an independent inquiry into "institutional Islamophobia" in the party.
Former minister Baroness Warsi warned that the party's failure to address the issue within its ranks risked damaging Conservative chances at the next election.
Lady Warsi, who was the first Muslim woman to have a seat at the Cabinet table, said there was a "deep-rooted problem" in the party and Theresa May had failed to act.
A total of 14 Conservative members were suspended from the party over "Islamophobic" comments on the homepage of a Facebook group, as revealed by BuzzFeed News.
The "Jacob Rees-Mogg Supporters Group" contained posts calling for the closure of all mosques and branding Muslim Home Secretary Sajid Javid a "Trojan horse".
'Abuse of any kind is wrong'
Watch: Labour MP Khalid Mahmood talking to talkRADIO's Julia Hartley-Brewer.
A Conservative party spokesman said: "This Facebook group is in no way affiliated with the Conservative Party and many of the people identified on it are not party members.
"However we have identified some people who are party members and they have been immediately suspended, pending further investigation.
"When we find evidence of members making offensive or inappropriate comments, we consistently take decisive action. Discrimination or abuse of any kind is wrong and will not be tolerated."
Labour MP Khalid Mahmood said despite the Conservative party dealing with the “so-called supporters of” Jacob Rees-Mogg, an investigation needed to take place.
He told talkRADIO’s Julia Hartley-Brewer: “People have been saying today is that the Conservative Party has acted really quickly and ‘isn’t it good?’ I disagree with that.
“Senior Conservative politicians such as Baroness Warsi have made a huge number of complaints and they have not been investigated.
“On this occasion they have dealt with the so-called supporters of Mr Rees-Mogg but I think there needs to be a proper investigation to deal with issue.
“It is a very serious issue and any forms of racism such as islamophobia and anti-semitism should not be condoned by anybody.”