A man has been arrested in Mexico on suspicion of burning down a bar after he was kicked out, killing 11 individuals, officials say.

The attack occurred on Friday night in San Luis Rio Colorado, which borders the US. The bar sits only one road away from the border.

Authorities say a drunk young man hurled a Molotov cocktail at the Beer House bar after being thrown out.

He had been harassing ladies before being kicked out.

The mayor of San Luis Rio Colorado tweeted on Saturday afternoon that a suspect had been arrested. He has not yet been named.

The fire killed seven men and four women and left four other people hospitalized, according to a statement from the Sonora state Attorney General's Office. A number of those injured were rushed across the border to hospitals in the United States for treatment.

"According to versions (from) several witnesses, the person with a young, male appearance was disrespecting women in that bar and was expelled," the statement said.

It described the object thrown "a kind of 'Molotov' cocktail".

Investigations continue to "clarify the facts" and "bring justice," it said, adding that "in Sonora, no one is above the law".

It is unclear if the incident is related to organized crime, which has plagued Mexico for years.

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