“Police confirm that reports were lodged and investigations are ongoing,” the police and IMDA said on Thursday. “IMDA is also investigating a possible breach of licence conditions.”

The band shouted “Free Palestine” during their performance at The Star Performing Arts Centre, prompting many audience members to join in the chant, said a concertgoer who asked not to be identified.

Singapore does not allow the public display of foreign national emblems without a permit or exemption. Offenders may be fined up to S$500 (US$390), face up to six months’ jail, or both.

The Star and the concert’s promoter Lushington Entertainments have been contacted for comment.