Labor's parliamentary secretary has broken her party's stance of bipartisan support for raising the terror alert, branding Prime Minister Tony Abbott a "terror" and criticising the Coalition's domestic policies.

The West Australian MP Alannah MacTiernan took to Twitter late on Friday night tweeting: "The Jihadi threat is real but many Australians also see Abbott as a terror as he takes a wrecking ball to our social infrastructure".

Breaking ranks: Alannah MacTiernan. Credit:Alex Ellinghausen

Using the terror alert as an opportunity to attack Mr Abbott's domestic policies contradicts the position of Opposition Leader Bill Shorten who, on Friday afternoon, vowed his full support to the Prime Minister on the matter of national security.

"The Prime Minister and I are partners when it comes to matters of national security and protecting Australians. We are in this together," Mr Shorten said.