India, May 30 -- Five migrant workers from Uttar Pradesh were killed and 27 were injured when a blast ripped through an illegal firecracker manufacturing and packaging unit and brought the two-storeyed building down on the outskirts of Singhewala village in Lambi sub tehsil of Punjab's Muktsar district early on Friday, police said.

The blast occurred around 2am in the two-storeyed factory located in a field adjoining the Singhawali-Kotli road bordering Haryana, Lambi deputy superintendent of police (DSP) Jaspal Singh said, adding that migrant labourers worked at the unit.

Muktsar deputy commissioner Abhijeet Kaplish said the injured had been rushed to the All India Institute of Medical Sciences (AIIMS), Bathinda, and hospitals in Muktsa...