LISBON (Reuters) - The head of the Portuguese agency responsible for enforcing a new ban on smoking in public was seen lighting up at a New Year party, breaking the law on the first day it came into effect.

Antonio Nunes, president of Portugal's food standards agency, was photographed by the daily Diario de Noticias smoking a cigar at a casino on the outskirts of Lisbon.

Nunes told the daily he was not aware the anti-smoking law, which applies to cafes, restaurants and bars, also included casinos. But a spokesman for the Ministry of Health said it did.

"We will have to look into what is in the law," Nunes said.

(Reporting by Henrique Almeida; editing by Sarah Marsh)