Australia claim world relay gold

Australia have claimed women's 4x100m freestyle relay gold at the world swimming championships in Russia on Sunday.

Emily Seebohm (L) and Cate Campbell have lead Australia to haul of six gold medals in Hong Kong. (AAP)

London Olympic champions Australia have claimed the women's 4x100m freestyle final gold at the world swimming championships in Russia.

The team of Emily Seebohm, Emma McKeon and Bronte and Cate Campbell clocked three minutes, 31.48 seconds in Kazan on Sunday night - a new meet record.

The Netherlands (3:33.67) took silver and the United States bronze (3:34.61).

Australia are the world record holders in the event (3:30.98).