A murder inquiry has been launched into the death of a prisoner.
Darren Brownlie, 47, died at Low Moss jail in Bishopbriggs, East Dunbartonshire, on Monday.
Following a post-mortem, police have now launched the murder investigation.
Four men were arrested on suspicion of assault and inquiries are continuing.
A Police Scotland spokeswoman said: “Police Scotland was made aware of the death of a 47-year-old man within HMP Low Moss on Monday January 6.
“The 47-year-old man can be named as Darren Brownlie and his family have been informed. A report will be submitted to the procurator fiscal.”
A Scottish Prison Service spokeswoman confirmed an incident took place at Low Moss on Monday but said no further comment could be made on a live police investigation.