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Rock band the Kings of Leon have been forced to end a concert early after pigeons defecated on them from the rafters of a US venue.

The rockers abandoned the gig in St Louis after three songs when bass player Jared Followill was hit in the mouth and face by pigeon droppings.

Drummer Nathan Followill later apologised to fans via Twitter, saying "it was too unsanitary to continue".

Their publicist added the band found it hard to carry on after the incident.

"Jared was hit several times during the first two songs. On the third song, when he was hit in the cheek and some of it landed near his mouth, they couldn't deal [with it] any longer," said Amy Mendelsohn.

"It's not only disgusting - it's a toxic hazard. They really tried to hang in there."

Opening acts The Postelles and The Stills had also come off stage after their sets were covered in excrement.

The Grammy-winning band are due to continue their tour in Cleveland, Ohio on Monday evening following the incident at at Verizon Wireless Amphitheatre.

They are currently promoting their fourth album, Only By The Night, and are due to visit the UK later this summer.

Nashville brothers Caleb, Nathan and Jared make up the group, along with their cousin Matthew on lead guitar.

Fans who were at the curtailed concert will be offered refunds.