Macau was rocked by more arson attacks yesterday as the enclave's police chief, Antonio Marques Baptista, faced calls in Portugal to step down. Dr Baptista came under attack from a judiciary police union official and a former officer turned newspaper columnist, in the daily paper Diario de Noticias. Both men called for his immediate replacement. However, Portuguese President Jorge Sampaio has pledged the Macau administration full support in its battle against organised crime. Dr Baptista, who narrowly escaped death when a bomb destroyed his car two weeks ago, is in Portugal where he is understood to be discussing possible reinforcements to back the fight against gangland violence. Last night, Macau security chiefs rejected the criticisms saying they were of 'little importance'. A spokesman said: 'These are just the opinions of two men printed in the same newspaper. Neither holds a position of authority and it is curious why no other newspaper in Portugal printed them. 'Dr Baptista is determined to do his job and he will be back in Macau soon.' The latest round of firebombings, which burnt 15 motorbikes and one van, takes to 73 the number of vehicles wrecked or damaged this month. The bikes were torched in the Ariea Preta district causing more than 100 residents to flee from their homes. A gunman walked into a karaoke bar in the Rua de Marques de Oliveira last night and fired two shots at the ceiling. He fired a third shot into the air outside the bar before fleeing on a motorcycle. The bar is said to be owned by a senior immigration department official.