Naples, November 22 - Naples Mayor Luigi De Magistris ordered rubbish collection company Sap.na Spa on Thursday to remove some 3,500 tonnes of rubbish languishing at a collection point in the southern Italian city amid a delay in waste-disposal proceedings. The measures have to be executed in the next 20 days, his signed request reads. The rubbish in question is piling up in a square that is owned by a company called Asia Spa, according to De Magistris. The urgent measures aim to avoid rubbish piling up on the streets. Naples' long-running trash crisis re-emerges periodically as the production of refuse outpaces disposal mechanisms, sometimes leaving tonnes of uncollected rubbish in the streets for prolonged periods of time. Historically, mafia involvement has also played a role.