A 29-year-old man was arrested in a restaurant toilet yesterday after trying to rob a bank just 300 metres from Western police station. The man entered a branch of Asia Commercial Bank in Des Voeux Road West at about 9.30am wearing a surgical mask. He handed a woman teller a note demanding $500,000. The man claimed to be carrying petrol and demanded the money in $1,000 notes, Chief Inspector Ng Yeung-yin of Western police station said. 'The robber fled empty-handed when the woman stepped away from the counter and sought help from her manager, who made a 999 emergency call,' he said. An assistant manager ran out of the bank and followed the man at a safe distance for 200 to 300 metres then pointed him out to police when they arrived. The man ran into a restaurant in Queen's Road West near the junction of Hill Road and hid inside a toilet. He later surrendered after a brief standoff, Mr Ng said. The man was being held in Western police station last night for questioning. No charges had been laid. Police said the man claimed he was a bus driver and that a Kowloon Motor Bus driver's uniform had been found in his rucksack after the arrest. The police are trying to confirm his identity with the bus company. There have been 11 bank robberies in the first seven months of the year, compared with 20 for the same period last year.