Committee chair Peta Murphy says Australians are among the biggest gambling losers anywhere in the world, and previous attempts to regulate gambling advertising have failed to address the problem.

The NFL said Tuesday it plans to redouble its efforts to reinforce its gambling policy to players in the wake of a rash of recent violations.

A series of advertisements for an online casino that target Australians are being shown on Facebook. The case has reopened the debate about how easy it is for offshore businesses to use the internet to evade Australian law, writes Casey Briggs.