Concertgoers have faced backlash over drunken behaviour at a Toto concert.

The American soft rockers are in New Zealand for a series 'A Summer's Day Live' concerts.

The Africa hitmakers were in New Plymouth on Friday, but their songs were overshadowed by the alcohol-fuelled antics of those in the crowd. 

Stuff reports that around 20 men were seen groping and pushing women in the crowd, with one women claiming she had to fight the men off.

The behaviour became so messy that guitarist Steve Lukather called out the behaviour from the stage. 

Tim Roxborogh asked listeners if this is a sign that middle aged people are the ones we should be concerned about at concerts, rather than teenagers and young adults.

He says that it could spark concerns that see venues adopting a dry policy.

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