A dad from south-western Sydney who "checks his lottery tickets every few weeks" has found out his latest entry is worth $50m.

Emergency warnings have been issued for two separate NSW bushfires as strong winds picked up across the state's coast on Saturday afternoon.

One train stopped about 100 metres from Newtown station, and another near Petersham station.

Police said the officer intervened in an altercation and was stabbed in the torso.

Two men in custody over the alleged murder were arrested mid-haircut - and one of them cried as he was led away.