Image: Twitter/Natasha Squarey

Police have arrested twin brothers who allegedly bashed a man with a baseball bat in front of his daughter in Sydney’s south-west.

At about 7.30 last night, the 42-year-old man and his 20-year-old daughter went to a home on Truman Avenue at Riverwood to return a mobile phone.

The situation escalated with two 19-year-old brothers chasing the pair from the home.

The twins caught them nearby and allegedly attacked the man with the baseball bat.

Police say three other men joined the attack, punching and kicking him while he was on the ground and fleeing before police arrived.

A 42yo man is in hospital with a fractured skull after he was assaulted with a baseball bat in #Riverwood last night. 19yo twin brothers have been charged and will face court this morning. @7NewsSydney pic.twitter.com/ffWRwubf7D

— Natasha Squarey (@NatashaSquarey) August 21, 2019

Witnesses phoned emergency services, reporting the man was unresponsive on the ground.

He was rushed to St George Hospital with a fractured skull and remains there in a stable condition.

The 19-year-old twins were arrested at the scene and have been refused bail to face court today.

Police will address the media at 10am… more information to come