"According to unofficial information, which we have not corroborated, two vehicles pulled up ... both black, and apparently six armed men tossed Molotov cocktails ," Alor told a local radio station
Alor said experts were examining the wreckage of the bar. The bar offered table-dances and other entertainment, and had a rough reputation. Alor said the bar had had problems in the past, but did not offer any details.
Businesses throughout Mexico are often hit up for protection money by drug cartels, which sometimes set fire to those that refuse to pay.
Cancun has largely avoided the bloodshed in which more 28,000 people have died in drug-related violence since late 2006. However, drug cartels and immigrant traffickers operate in the area.