Two members of Massive Attack were issued with stern warnings and barred from re-entering Singapore after the British band ended a performance on Wednesday with a display of the Palestinian flag, police said on Friday.

A French student was fined 600 Singapore dollars ($A666) after pleading guilty Thursday to a public nuisance charge in Singapore for recording himself licking a straw from an orange juice vending machine and putting it back in what lawyers described as a social media stunt.