The Health and Safety Executive is making inquiries after two incidents at a Leeds factory in the space of 10 days.
They took place at Glynn Print Finishers, Lockside Road, Stourton.
A spokeswoman for the HSE said: “HSE is aware of two incidents there, one on February 18 and one yesterday (Feb 27) and is making initial inquiries.”
Asked whether an investigation would follow, she said: “It depends on the outcomes from the initial inquiries.”
She said no HSE inspector had been on the premises at the time of the second incident.
When contacted by the Yorkshire Evening Post Graham Glynn, the firm’s managing director, refused to comment.
Glynn Print Finishers was established by Mr Glynn in 1988 as a trade print finishing house.
It originally employed six people and now boasts more than 100 workers across the group.
Services include guillotining, trimming, binding, saddlestitching, perforating and shrinkwrapping.