A teenager is under arrest on suspicion of hurling a glass bottle which killed a mother-of-three as she enjoyed a Christmas drink in a crowded pub.
The 19-year-old was arrested hours after Emma O'Kane was killed when the bottle shattered against a pillar and a shard of glass stuck in her neck, cutting her throat, according to a witness.
She had been standing with her sister and other friends enjoying a Boxing Day drink at the bar of the Queen Anne Hotel in Heywood, Greater Manchester.
Ms O'Kane, who has children aged aged six, two and one, collapsed in a pool of blood and was pronounced dead at Fairfield Hospital in Bury, shortly after the incident at 2am.
A post-mortem examination will take place later.
Police said a man had been refused entry by door staff, and threw a bottle inside the pub.
Ms O'Kane lived in Heywood with her partner and three children.
Detective Superintendent Peter Jackson, who is leading the murder investigation, said: "A man tried to get into the pub and was refused entry. He became involved in an altercation with the doormen and threw a bottle into the pub.
"A shard of glass then caused a serious injury to this woman who was nothing to do with the argument and was out enjoying a drink at the bar.
"This tragic incident has left this woman's family devastated."