A number of services on Sydney's T5 train line were suspended on Monday following claims traces of asbestos were confirmed in drivers' carriages.

On Monday a statement to union members from the Rail, Tram and Bus Union NSW Locomotive Division was released citing asbestos dust or particles had been found between March and June 2017 within the Flemington and Hornsby Maintenance Centres.

Despite Sydney Trains indicating they have the issue under control, the RTBU believes their response is not good enough.

A number of services on the T5 train line were suspended on Monday following claims traces of asbestos were confirmed in drivers' carriage

Train drivers are now striking, refusing to work impacting the operation of the T5 service

'At the time of writing, we believe Sydney Trains have indicated that the dust poses no issue due to it being contained,' the statement said.

'Additionally the dust discovered as part of ongoing inspections is being immediately removed according to requirements therefore poses no credible risk. This response is wholly inadequate.

Train drivers were refusing to work impacting the operation of the T5 service however a Sydney Trains representative told Daily Mail Australia on Tuesday all services are now back up and running.

The Locomotive Division say they were 'concerned' at Sydney Trains' failure to advise their employees and the union that the sample data had reflected a presence of asbestos, despite claims the contamination is 'contained'.

They advised members who are concerned to speak with their managers.

The Rail, Tram and Bus Union NSW Locomotive Division released a statement citing Sydney Trains' response was 'wholly inadequate'

'Members should request to not be placed in work environments of questionable safety until such time as Sydney Trains can provide satisfactory information to allay concerns of members.'

A Sydney Trains spokesperson said there were plans in place to remove the particles found as part of a train upgrade program but there is no risk for commuters or staff.

'Services on the T5 Cumberland Line were temporarily suspended earlier today due to a small number of staff raising concerns regarding traces of asbestos found behind secure service panels in the driver compartment.

Sydney's T5 train line has been suspended after asbestos was found in driver's carriages

'There is no risk to staff or customers as the particles are located behind a secure panel and are inaccessible.'

Sydney Trains said they have requested a meeting with SafeWork NSW and the RTBU to resolve the situation and there is no strike action in place.

Daily Mail Australia approached the RTBU for further comment.

As of Tuesday all services are back up and running as normal.